| 1 | Environmental Engineering | 259 | 45.7K | 4 | 4 |
| 2 | Environmental Engineering | 317 | 33.9K | 4 | 4 |
| 3 | Dynamics | 338 | 31.0K | 4 | 4 |
| 4 | Environmental Engineering | 340 | 30.7K | 5 | 4 |
| 5 | Environmental Science | 305 | 29.5K | 13 | 6 |
| 6 | Environmental Engineering | 272 | 28.6K | 4 | 4 |
| 7 | Chemistry | 329 | 25.7K | 14 | 11 |
| 8 | Environmental Engineering | 129 | 25.0K | 8 | 4 |
| 9 | Environmental Science | 262 | 24.2K | 7 | 7 |
| 10 | Environmental Engineering | 172 | 21.6K | 4 | 4 |
| 11 | Environmental Science | 168 | 21.0K | 6 | 4 |
| 12 | Environmental Engineering | 153 | 18.4K | 4 | 4 |
| 13 | Environmental Science | 232 | 18.0K | 7 | 4 |
| 14 | Environmental Engineering | 86 | 16.9K | 11 | 5 |
| 15 | Environmental Science | 242 | 16.8K | 9 | 6 |
| 16 | Chemical Engineering | 58 | 16.5K | 8 | 4 |
| 17 | Environmental Engineering | 133 | 16.2K | 5 | 4 |
| 18 | Environmental Engineering | 155 | 16.0K | 11 | 5 |
| 19 | Environmental Science | 165 | 15.8K | 10 | 6 |
| 20 | Environmental Science | 229 | 15.4K | 6 | 4 |
| 21 | Environmental Engineering | 163 | 14.7K | 4 | 4 |
| 22 | Environmental Health | 81 | 14.3K | 8 | 5 |
| 23 | Environmental Engineering | 134 | 14.2K | 5 | 5 |
| 24 | Bioengineering | 94 | 14.1K | 11 | 6 |
| 25 | Civil Engineering | 112 | 13.9K | 14 | 6 |
| 26 | Environmental Engineering | 163 | 13.8K | 8 | 4 |
| 27 | Ecology | 66 | 13.8K | 25 | 10 |
| 28 | Sustainable Engineering | 132 | 13.0K | 5 | 4 |
| 29 | Geography | 126 | 12.9K | 16 | 8 |
| 30 | Quality Management | 65 | 12.9K | 10 | 10 |
| 31 | Public Health | 77 | 12.9K | 17 | 5 |
| 32 | Ecology | 156 | 12.7K | 11 | 7 |
| 33 | Environmental Engineering | 163 | 11.9K | 4 | 5 |
| 34 | Environmental Engineering | 153 | 11.8K | 11 | 9 |
| 35 | Public Health | 157 | 11.8K | 103 | 83 |
| 36 | Environmental Engineering | 85 | 11.7K | 15 | 8 |
| 37 | Architectural Engineering | 131 | 11.5K | 6 | 6 |
| 38 | Environmental Science | 95 | 11.4K | 10 | 5 |
| 39 | Public Policy | 148 | 11.3K | 4 | 4 |
| 40 | Environmental Science | 147 | 11.3K | 11 | 7 |
| 41 | Environmental Engineering | 102 | 10.8K | 5 | 7 |
| 42 | Education | 129 | 10.6K | 34 | 20 |
| 43 | Environmental Engineering | 115 | 10.2K | 21 | 15 |
| 44 | Toxicology | 100 | 9.9K | 7 | 5 |
| 45 | Environmental Engineering | 106 | 9.8K | 14 | 11 |
| 46 | Environmental Engineering | 121 | 9.7K | 6 | 6 |
| 47 | Chemistry | 87 | 9.7K | 53 | 34 |
| 48 | Environmental Science | 80 | 9.5K | 5 | 5 |
| 49 | Environmental Science | 107 | 9.5K | 21 | 24 |
| 50 | Chemical Engineering | 34 | 9.5K | 38 | 16 |
| 51 | Chemistry | 71 | 9.4K | 13 | 6 |
| 52 | Chemistry | 86 | 9.4K | 23 | 18 |
| 52 | Geochemistry | 86 | 9.4K | 19 | 17 |
| 54 | Ecology | 68 | 9.3K | 5 | 4 |
| 55 | Analytical Chemistry | 92 | 9.2K | 8 | 4 |
| 56 | Chemistry | 139 | 9.1K | 8 | 11 |
| 57 | Environmental Chemistry | 82 | 9.1K | 4 | 4 |
| 58 | Environmental Science | 60 | 8.9K | 15 | 9 |
| 58 | Environmental Engineering | 89 | 8.9K | 6 | 6 |
| 60 | Education | 112 | 8.9K | 25 | 14 |
| 61 | Architecture | 87 | 8.8K | 6 | 5 |
| 62 | Education | 119 | 8.7K | 33 | 21 |
| 63 | Microbial Ecology | 52 | 8.7K | 14 | 12 |
| 64 | Chemistry | 77 | 8.6K | 33 | 32 |
| 65 | Environmental Engineering | 71 | 8.4K | 19 | 12 |
| 66 | Environmental Health | 111 | 8.2K | 21 | 22 |
| 67 | Environmental Engineering | 92 | 8.0K | 6 | 5 |
| 68 | Chemistry | 74 | 8.0K | 34 | 28 |
| 69 | Chemical Engineering | 45 | 8.0K | 23 | 9 |
| 70 | Environmental Science | 78 | 7.9K | 12 | 11 |
| 71 | Public Health | 113 | 7.8K | 35 | 27 |
| 72 | Nanotechnology | 42 | 7.8K | 4 | 4 |
| 73 | Chemistry | 100 | 7.8K | 25 | 19 |
| 74 | Public Health | 24 | 7.8K | 63 | 9 |
| 75 | Chemistry | 95 | 7.6K | 26 | 22 |
| 76 | Chemical Engineering | 35 | 7.6K | 36 | 6 |
| 77 | Environmental Science | 44 | 7.6K | 8 | 7 |
| 78 | Atmospheric Science | 29 | 7.4K | 25 | 13 |
| 79 | Public Health | 96 | 7.2K | 29 | 27 |
| 80 | Civil Engineering | 66 | 7.2K | 9 | 4 |
| 81 | Architectural Engineering | 22 | 7.1K | 33 | 4 |
| 82 | Environmental Engineering | 80 | 7.0K | 21 | 23 |
| 83 | Environmental Geology | 93 | 6.8K | 21 | 12 |
| 84 | Environmental Engineering | 78 | 6.8K | 12 | 4 |
| 85 | Environmental Health | 38 | 6.8K | 10 | 4 |
| 86 | Chemistry | 73 | 6.7K | 52 | 40 |
| 87 | Environmental Engineering | 111 | 6.6K | 14 | 12 |
| 88 | Environmental Science | 78 | 6.5K | 18 | 13 |
| 89 | Biology | 41 | 6.5K | 34 | 10 |
| 90 | Environmental Engineering | 47 | 6.5K | 15 | 4 |
| 91 | Education | 38 | 6.5K | 38 | 8 |
| 92 | Biotechnology | 81 | 6.4K | 6 | 6 |
| 93 | Public Health | 76 | 6.4K | 47 | 39 |
| 94 | Environmental Engineering | 66 | 6.4K | 4 | 4 |
| 95 | Education | 74 | 6.4K | 60 | 34 |
| 96 | Public Health | 76 | 6.3K | 45 | 36 |
| 97 | Nanotechnology | 56 | 6.3K | 4 | 5 |
| 98 | Pathology | 64 | 6.2K | 20 | 8 |
| 99 | Geography | 61 | 6.2K | 4 | 4 |
| 100 | Environmental Engineering | 26 | 6.2K | 6 | 4 |
| 101 | Toxicology | 107 | 6.1K | 11 | 8 |
| 102 | Zoology | 17 | 6.1K | 52 | 9 |
| 103 | Biochemistry | 34 | 6.0K | 62 | 45 |
| 104 | Environmental Engineering | 98 | 6.0K | 11 | 16 |
| 105 | Environmental Science | 41 | 6.0K | 17 | 6 |
| 106 | Toxicology | 27 | 6.0K | 36 | 8 |
| 107 | Environmental Engineering | 94 | 6.0K | 10 | 17 |
| 108 | Biotechnology | 30 | 5.9K | 8 | 5 |
| 109 | Environmental Engineering | 30 | 5.9K | 8 | 6 |
| 110 | Environmental Engineering | 106 | 5.9K | 6 | 7 |
| 111 | Civil Engineering | 76 | 5.9K | 20 | 11 |
| 112 | Environmental Engineering | 86 | 5.9K | 7 | 6 |
| 113 | Environmental Science | 20 | 5.8K | 3 | 3 |
| 114 | Chemical Engineering | 115 | 5.8K | 14 | 18 |
| 115 | Environmental Engineering | 52 | 5.8K | 20 | 12 |
| 116 | Biology | 9 | 5.8K | 115 | 14 |
| 117 | Food Safety | 17 | 5.8K | 18 | 6 |
| 118 | Chemistry | 40 | 5.7K | 36 | 14 |
| 119 | Environmental Engineering | 52 | 5.7K | 12 | 9 |
| 120 | Risk Management | 37 | 5.7K | 9 | 6 |
| 121 | Environmental Engineering | 56 | 5.6K | 11 | 5 |
| 122 | Environmental Engineering | 84 | 5.6K | 12 | 21 |
| 123 | Environmental Toxicology | 56 | 5.6K | 7 | 4 |
| 124 | Ecology | 51 | 5.6K | 28 | 20 |
| 125 | Environmental Science | 32 | 5.5K | 18 | 4 |
| 126 | Soil Science | 15 | 5.5K | 34 | 13 |
| 127 | Environmental Science | 93 | 5.5K | 10 | 5 |
| 128 | Environmental Toxicology | 12 | 5.5K | 16 | 6 |
| 129 | Environmental Engineering | 63 | 5.5K | 4 | 5 |
| 130 | Biology | 24 | 5.4K | 35 | 15 |
| 131 | Environmental Science | 92 | 5.4K | 16 | 13 |
| 132 | Environmental Health | 71 | 5.4K | 14 | 10 |
| 133 | Oceanography | 83 | 5.4K | 53 | 57 |
| 134 | Geography | 12 | 5.3K | 58 | 5 |
| 135 | Environmental Engineering | 64 | 5.3K | 32 | 27 |
| 136 | Biology | 42 | 5.2K | 27 | 14 |
| 137 | Chemical Engineering | 54 | 5.1K | 49 | 44 |
| 138 | Education | 67 | 5.1K | 45 | 20 |
| 139 | Chemistry | 44 | 5.1K | 44 | 26 |
| 140 | Chemistry | 36 | 5.0K | 12 | 6 |
| 141 | Chemistry | 67 | 4.9K | 21 | 17 |
| 142 | Architecture | 50 | 4.9K | 22 | 9 |
| 143 | Mechanical Engineering | 50 | 4.8K | 18 | 15 |
| 144 | Environmental Engineering | 48 | 4.7K | 6 | 5 |
| 145 | Environmental Engineering | 62 | 4.7K | 16 | 10 |
| 146 | Environmental Toxicology | 40 | 4.7K | 9 | 9 |
| 147 | Mechanical Engineering | 54 | 4.7K | 24 | 18 |
| 148 | Oceanography | 61 | 4.7K | 24 | 21 |
| 149 | Biology | 41 | 4.6K | 22 | 14 |
| 149 | Ecology | 3 | 4.6K | 65 | 12 |
| 149 | Marine Biology | 3 | 4.6K | 57 | 11 |
| 152 | Environmental Science | 63 | 4.6K | 10 | 9 |
| 153 | Environmental Science | 64 | 4.6K | 9 | 13 |
| 154 | Civil Engineering | 37 | 4.6K | 21 | 15 |
| 155 | Environmental Science | 31 | 4.4K | 28 | 7 |
| 156 | Environmental Engineering | 59 | 4.4K | 6 | 5 |
| 157 | Environmental Engineering | 28 | 4.3K | 10 | 5 |
| 158 | Environmental Chemistry | 38 | 4.3K | 29 | 15 |
| 159 | Environmental Engineering | 55 | 4.3K | 6 | 5 |
| 160 | Environmental Health | 64 | 4.3K | 16 | 15 |
| 161 | Astrophysics | 18 | 4.3K | 8 | 9 |
| 162 | Freshwater Ecology | 12 | 4.2K | 18 | 3 |
| 163 | Public Health | 44 | 4.2K | 100 | 59 |
| 164 | Environmental Chemistry | 29 | 4.2K | 7 | 6 |
| 165 | Environmental Science | 33 | 4.1K | 5 | 4 |
| 166 | Chemistry | 22 | 4.1K | 95 | 52 |
| 167 | Public Health | 27 | 4.1K | 60 | 30 |
| 167 | Environmental Engineering | 59 | 4.1K | 29 | 22 |
| 169 | Chemistry | 39 | 4.1K | 32 | 14 |
| 170 | Environmental Health | 46 | 4.1K | 6 | 5 |
| 171 | Agronomy | 46 | 4.1K | 25 | 23 |
| 172 | Forest Ecology | 49 | 4.0K | 20 | 22 |
| 173 | Ecology | 31 | 4.0K | 13 | 9 |
| 174 | Geochemistry | 18 | 4.0K | 7 | 3 |
| 175 | Chemical Engineering | 13 | 4.0K | 63 | 22 |
| 176 | Chemical Engineering | 12 | 3.9K | 6 | 4 |
| 177 | Microbiology | 37 | 3.9K | 32 | 32 |
| 178 | Environmental Science | 56 | 3.9K | 8 | 10 |
| 179 | Public Health | 56 | 3.9K | 212 | 175 |
| 180 | Civil Engineering | 54 | 3.9K | 9 | 6 |
| 181 | Chemistry | 47 | 3.9K | 14 | 8 |
| 182 | Environmental Science | 56 | 3.8K | 14 | 12 |
| 183 | Biology | 45 | 3.8K | 40 | 25 |
| 184 | Education | 36 | 3.8K | 15 | 6 |
| 185 | Chemistry | 26 | 3.7K | 62 | 24 |
| 186 | Civil Engineering | 38 | 3.7K | 19 | 16 |
| 187 | Environmental Science | 28 | 3.7K | 21 | 14 |
| 188 | Environmental Health | 35 | 3.7K | 17 | 10 |
| 189 | Environmental Health | 55 | 3.7K | 7 | 4 |
| 190 | Chemistry | 35 | 3.7K | 49 | 16 |
| 190 | Biochemistry | 45 | 3.7K | 14 | 7 |
| 190 | Freshwater Ecology | 5 | 3.7K | 26 | 8 |
| 193 | Freshwater Ecology | 3 | 3.7K | 1 | 1 |
| 194 | Environmental Science | 73 | 3.7K | 6 | 5 |
| 195 | Biology | 26 | 3.7K | 77 | 42 |
| 196 | Atmospheric Science | 48 | 3.7K | 21 | 18 |
| 197 | Environmental Health | 77 | 3.7K | 24 | 33 |
| 198 | Public Health | 58 | 3.6K | 85 | 67 |
| 199 | Chemistry | 32 | 3.6K | 42 | 21 |
| 200 | Civil Engineering | 26 | 3.6K | 10 | 6 |
| 201 | Environmental Engineering | 36 | 3.6K | 7 | 4 |
| 202 | Ecology | 31 | 3.6K | 36 | 22 |
| 203 | Chemical Engineering | 35 | 3.6K | 50 | 33 |
| 204 | Environmental Toxicology | 30 | 3.6K | 14 | 11 |
| 205 | Environmental Health | 55 | 3.6K | 16 | 15 |
| 206 | Public Health | 34 | 3.6K | 48 | 25 |
| 207 | Biology | 2 | 3.6K | 98 | 6 |
| 208 | Chemistry | 40 | 3.5K | 29 | 15 |
| 209 | Education | 4 | 3.5K | 11 | 4 |
| 210 | Civil Engineering | 38 | 3.5K | 26 | 12 |
| 211 | Chemistry | 59 | 3.5K | 61 | 71 |
| 211 | Environmental Engineering | 36 | 3.5K | 13 | 10 |
| 213 | Occupational Health | 38 | 3.5K | 26 | 16 |
| 214 | Environmental Toxicology | 64 | 3.5K | 20 | 15 |
| 215 | Engineering Mathematics | 6 | 3.5K | 148 | 20 |
| 216 | Environmental Science | 43 | 3.5K | 25 | 24 |
| 216 | Chemistry | 47 | 3.5K | 62 | 56 |
| 218 | Education | 47 | 3.4K | 55 | 40 |
| 219 | Biochemistry | 45 | 3.4K | 53 | 45 |
| 220 | Environmental Engineering | 29 | 3.4K | 20 | 7 |
| 221 | Chemistry | 39 | 3.4K | 72 | 55 |
| 222 | Chemistry | 50 | 3.4K | 29 | 27 |
| 223 | Environmental Science | 33 | 3.4K | 19 | 14 |
| 224 | Metallurgy | 34 | 3.4K | 67 | 39 |
| 225 | Environmental Engineering | 30 | 3.4K | 5 | 5 |
| 226 | Analytical Chemistry | 27 | 3.3K | 5 | 5 |
| 227 | Microbiology | 34 | 3.3K | 39 | 25 |
| 228 | Chemistry | 37 | 3.3K | 43 | 27 |
| 229 | Environmental Science | 27 | 3.3K | 29 | 16 |
| 230 | Ecology | 65 | 3.3K | 7 | 5 |
| 231 | Environmental Engineering | 32 | 3.3K | 12 | 8 |
| 232 | Geochemistry | 47 | 3.3K | 7 | 7 |
| 233 | Biochemistry | 48 | 3.3K | 26 | 25 |
| 234 | Environmental Engineering | 21 | 3.2K | 26 | 8 |
| 235 | Environmental Science | 30 | 3.2K | 19 | 15 |
| 236 | Chemistry | 35 | 3.2K | 11 | 9 |
| 236 | Biochemistry | 35 | 3.2K | 11 | 9 |
| 238 | Dynamics | 37 | 3.2K | 50 | 44 |
| 239 | Molecular Biology | 4 | 3.2K | 44 | 10 |
| 240 | Public Health | 36 | 3.2K | 47 | 25 |
| 241 | Biology | 29 | 3.2K | 34 | 17 |
| 242 | Ecology | 42 | 3.2K | 17 | 8 |
| 243 | Chemistry | 31 | 3.2K | 68 | 36 |
| 244 | Environmental Science | 48 | 3.2K | 14 | 10 |
| 245 | Biochemistry | 28 | 3.2K | 33 | 14 |
| 246 | Chemistry | 47 | 3.2K | 58 | 50 |
| 247 | Public Health | 11 | 3.2K | 28 | 8 |
| 248 | Biochemistry | 34 | 3.2K | 39 | 26 |
| 249 | Biochemistry | 33 | 3.2K | 41 | 40 |
| 250 | Structural Engineering | 17 | 3.1K | 49 | 23 |
| 251 | Ecological Engineering | 29 | 3.1K | 10 | 4 |
| 252 | Environmental Engineering | 29 | 3.1K | 19 | 17 |
| 253 | Chemistry | 37 | 3.1K | 48 | 24 |
| 254 | Mechanical Engineering | 46 | 3.1K | 7 | 5 |
| 254 | Chemistry | 34 | 3.1K | 17 | 17 |
| 256 | Biology | 32 | 3.0K | 27 | 17 |
| 257 | Genomics | 12 | 3.0K | 22 | 4 |
| 258 | Sustainable Development | 13 | 3.0K | 6 | 4 |
| 259 | Public Health | 34 | 3.0K | 25 | 13 |
| 260 | Chemistry | 24 | 3.0K | 52 | 33 |
| 260 | Environmental Health | 28 | 3.0K | 12 | 7 |
| 262 | Biotechnology | 28 | 3.0K | 40 | 35 |
| 263 | Chemistry | 34 | 3.0K | 57 | 40 |
| 264 | Environmental Engineering | 37 | 3.0K | 23 | 16 |
| 265 | Education | 62 | 3.0K | 60 | 45 |
| 266 | Chemistry | 41 | 3.0K | 34 | 17 |
| 267 | Environmental Chemistry | 35 | 3.0K | 4 | 4 |
| 268 | Environmental Science | 8 | 3.0K | 10 | 4 |
| 269 | Civil Engineering | 39 | 2.9K | 14 | 10 |
| 270 | Environmental Engineering | 53 | 2.9K | 28 | 17 |
| 271 | Chemistry | 25 | 2.9K | 29 | 17 |
| 272 | Environmental Engineering | 21 | 2.9K | 8 | 4 |
| 273 | Environmental Engineering | 21 | 2.9K | 17 | 10 |
| 274 | Geography | 29 | 2.9K | 36 | 15 |
| 275 | Chemistry | 29 | 2.9K | 44 | 21 |
| 276 | Biochemical Engineering | 11 | 2.9K | 63 | 19 |
| 277 | Chemistry | 10 | 2.8K | 58 | 20 |
| 278 | Ecological Engineering | 24 | 2.8K | 32 | 16 |
| 279 | Chemistry | 36 | 2.8K | 59 | 54 |
| 280 | Chemistry | 41 | 2.8K | 34 | 35 |
| 281 | Public Health | 58 | 2.8K | 33 | 27 |
| 282 | Environmental Chemistry | 12 | 2.8K | 5 | 4 |
| 283 | Chemical Engineering | 60 | 2.8K | 31 | 33 |
| 284 | Environmental Health | 52 | 2.7K | 10 | 9 |
| 285 | Geochemistry | 24 | 2.7K | 12 | 14 |
| 286 | Environmental Engineering | 34 | 2.7K | 28 | 28 |
| 287 | Epidemiology | 27 | 2.7K | 67 | 60 |
| 288 | Biology | 6 | 2.7K | 136 | 22 |
| 289 | Dentistry | 27 | 2.7K | 58 | 23 |
| 289 | Environmental Engineering | 14 | 2.7K | 18 | 6 |
| 291 | Education | 26 | 2.6K | 124 | 47 |
| 292 | Environmental Engineering | 46 | 2.6K | 8 | 6 |
| 293 | Biology | 26 | 2.6K | 37 | 28 |
| 293 | Chemistry | 26 | 2.6K | 35 | 20 |
| 295 | Environmental Engineering | 40 | 2.6K | 5 | 7 |
| 296 | Education | 35 | 2.6K | 5 | 4 |
| 297 | Chemistry | 41 | 2.6K | 34 | 33 |
| 298 | Catalysis | 18 | 2.6K | 10 | 7 |
| 299 | Chemistry | 23 | 2.6K | 95 | 62 |
| 300 | Ecology | 37 | 2.6K | 24 | 25 |
| 301 | Environmental Engineering | 38 | 2.6K | 8 | 8 |
| 302 | Biology | 24 | 2.6K | 129 | 106 |
| 303 | Geology | 24 | 2.6K | 21 | 15 |
| 304 | Ecology | 62 | 2.6K | 16 | 14 |
| 305 | Chemistry | 35 | 2.5K | 33 | 24 |
| 306 | Economic Geology | 27 | 2.5K | 23 | 16 |
| 307 | Zoology | 18 | 2.5K | 30 | 12 |
| 308 | Chemistry | 30 | 2.5K | 13 | 5 |
| 309 | Education | 24 | 2.5K | 112 | 30 |
| 310 | Environmental Engineering | 31 | 2.5K | 18 | 10 |
| 311 | Biology | 31 | 2.5K | 65 | 67 |
| 311 | Environmental Engineering | 32 | 2.5K | 16 | 7 |
| 313 | Education | 57 | 2.5K | 28 | 20 |
| 314 | Biology | 35 | 2.5K | 52 | 33 |
| 315 | Environmental Science | 41 | 2.5K | 51 | 40 |
| 316 | Epidemiology | 12 | 2.5K | 67 | 26 |
| 317 | Chemistry | 34 | 2.5K | 41 | 25 |
| 318 | Chemistry | 24 | 2.5K | 24 | 15 |
| 319 | Chemistry | 19 | 2.5K | 69 | 42 |
| 320 | Chemical Engineering | 31 | 2.4K | 45 | 46 |
| 321 | Education | 42 | 2.4K | 64 | 60 |
| 322 | Chemical Engineering | 5 | 2.4K | 13 | 3 |
| 323 | Chemical Engineering | 22 | 2.4K | 6 | 4 |
| 324 | Chemical Engineering | 13 | 2.4K | 17 | 5 |
| 325 | Biotechnology | 21 | 2.4K | 7 | 4 |
| 325 | Biostatistics | 21 | 2.4K | 41 | 33 |
| 325 | Education | 33 | 2.4K | 37 | 30 |
| 328 | Environmental Science | 23 | 2.4K | 8 | 11 |
| 329 | Chemistry | 19 | 2.4K | 37 | 12 |
| 330 | Biomedical Engineering | 10 | 2.4K | 50 | 16 |
| 331 | Chemistry | 12 | 2.4K | 106 | 44 |
| 332 | Geography | 13 | 2.4K | 51 | 11 |
| 333 | Geology | 39 | 2.4K | 25 | 26 |
| 333 | Geophysics | 39 | 2.4K | 24 | 23 |
| 335 | Chemistry | 29 | 2.4K | 24 | 7 |
| 336 | Chemical Engineering | 17 | 2.3K | 22 | 19 |
| 337 | Environmental Engineering | 12 | 2.3K | 17 | 4 |
| 338 | Environmental Science | 35 | 2.3K | 9 | 10 |
| 338 | Occupational Health | 27 | 2.3K | 9 | 8 |
| 340 | Environmental Science | 30 | 2.3K | 12 | 11 |
| 340 | Nanotechnology | 18 | 2.3K | 5 | 4 |
| 342 | Environmental Engineering | 34 | 2.3K | 17 | 20 |
| 343 | Environmental Science | 39 | 2.3K | 15 | 19 |
| 344 | Microbiology | 16 | 2.3K | 22 | 25 |
| 345 | Public Health | 13 | 2.3K | 140 | 49 |
| 345 | Environmental Science | 48 | 2.3K | 32 | 29 |
| 347 | Environmental Health | 34 | 2.2K | 19 | 18 |
| 348 | Biotechnology | 23 | 2.2K | 145 | 72 |
| 349 | Film | 15 | 2.2K | 29 | 12 |
| 350 | Pharmacology | 7 | 2.2K | 28 | 11 |
| 350 | Toxicology | 7 | 2.2K | 18 | 10 |
| 350 | Environmental Engineering | 32 | 2.2K | 13 | 9 |
| 353 | Public Health | 30 | 2.2K | 40 | 19 |
| 354 | Education | 31 | 2.2K | 58 | 47 |
| 355 | Biochemistry | 16 | 2.2K | 58 | 33 |
| 356 | Chemistry | 13 | 2.2K | 60 | 28 |
| 356 | Nutrition | 22 | 2.2K | 17 | 11 |
| 358 | Planetary Science | 31 | 2.2K | 32 | 32 |
| 359 | Chemical Engineering | 10 | 2.2K | 99 | 42 |
| 360 | Atmospheric Science | 32 | 2.2K | 23 | 21 |
| 361 | Analytical Chemistry | 32 | 2.2K | 5 | 6 |
| 362 | Environmental Engineering | 44 | 2.2K | 18 | 15 |
| 363 | Environmental Science | 23 | 2.1K | 21 | 15 |
| 364 | Biology | 29 | 2.1K | 45 | 44 |
| 365 | Environmental Engineering | 48 | 2.1K | 10 | 6 |
| 366 | Chemistry | 16 | 2.1K | 159 | 127 |
| 367 | Biology | 8 | 2.1K | 39 | 9 |
| 368 | Environmental Engineering | 17 | 2.1K | 7 | 4 |
| 369 | Chemistry | 27 | 2.1K | 28 | 37 |
| 370 | Chemistry | 5 | 2.1K | 79 | 23 |
| 371 | Biology | 14 | 2.1K | 53 | 21 |
| 372 | Environmental Engineering | 34 | 2.1K | 17 | 12 |
| 373 | Oceanography | 11 | 2.1K | 30 | 11 |
| 373 | Environmental Engineering | 3 | 2.1K | 41 | 4 |
| 373 | Oceanography | 11 | 2.1K | 31 | 11 |
| 376 | Chemistry | 9 | 2.1K | 81 | 31 |
| 377 | Microbiology | 29 | 2.1K | 65 | 57 |
| 378 | Materials Science | 27 | 2.1K | 24 | 21 |
| 378 | Earth science | 25 | 2.1K | 60 | 46 |
| 380 | Nanotechnology | 13 | 2.1K | 2 | 2 |
| 381 | Biology | 38 | 2.1K | 48 | 46 |
| 382 | Chemical Engineering | 19 | 2.1K | 52 | 33 |
| 383 | Chemistry | 25 | 2.1K | 80 | 57 |
| 384 | Agronomy | 18 | 2.1K | 60 | 46 |
| 385 | Chemistry | 21 | 2.1K | 50 | 27 |
| 386 | Environmental Engineering | 9 | 2.1K | 13 | 8 |
| 386 | Environmental Science | 26 | 2.1K | 14 | 10 |
| 388 | Environmental Engineering | 19 | 2.0K | 6 | 4 |
| 388 | Catalysis | 20 | 2.0K | 19 | 11 |
| 390 | Chemical Engineering | 10 | 2.0K | 27 | 6 |
| 391 | Botany | 15 | 2.0K | 32 | 22 |
| 392 | Chemistry | 15 | 2.0K | 71 | 37 |
| 393 | Environmental Engineering | 30 | 2.0K | 23 | 21 |
| 394 | Bioengineering | 14 | 2.0K | 23 | 7 |
| 395 | Environmental Science | 21 | 2.0K | 30 | 19 |
| 396 | Chemical Engineering | 22 | 2.0K | 86 | 87 |
| 397 | Public Health | 25 | 2.0K | 31 | 19 |
| 398 | Ecological Engineering | 37 | 2.0K | 6 | 4 |
| 399 | Chemistry | 20 | 2.0K | 89 | 74 |
| 400 | Geography | 10 | 2.0K | 60 | 23 |
| 401 | Chemistry | 21 | 2.0K | 31 | 10 |
| 402 | Biochemical Engineering | 20 | 2.0K | 17 | 12 |
| 403 | Chemistry | 24 | 2.0K | 78 | 67 |
| 403 | Chemical Engineering | 8 | 2.0K | 75 | 30 |
| 405 | Biomedical Sciences | 38 | 2.0K | 14 | 9 |
| 406 | Chemistry | 16 | 2.0K | 7 | 4 |
| 407 | Chemistry | 10 | 2.0K | 83 | 42 |
| 408 | Biology | 24 | 2.0K | 40 | 30 |
| 409 | Environmental Engineering | 27 | 2.0K | 9 | 8 |
| 410 | Environmental Health | 2 | 2.0K | 24 | 3 |
| 411 | Public Health | 24 | 2.0K | 89 | 69 |
| 411 | Education | 43 | 2.0K | 64 | 57 |
| 413 | Geochemistry | 19 | 2.0K | 20 | 15 |
| 414 | Environmental Health | 13 | 1.9K | 20 | 8 |
| 415 | Geology | 24 | 1.9K | 10 | 9 |
| 415 | Higher Education | 3 | 1.9K | 2 | 2 |
| 417 | Nanotechnology | 16 | 1.9K | 3 | 3 |
| 418 | Civil Engineering | 18 | 1.9K | 9 | 5 |
| 419 | Environmental Engineering | 13 | 1.9K | 22 | 11 |
| 420 | Environmental Engineering | 15 | 1.9K | 23 | 8 |
| 421 | Environmental Health | 15 | 1.9K | 7 | 4 |
| 422 | Public Health | 40 | 1.9K | 36 | 30 |
| 423 | Public Health | 19 | 1.9K | 36 | 16 |
| 424 | Genomics | 21 | 1.9K | 15 | 19 |
| 425 | Chemistry | 26 | 1.9K | 19 | 16 |
| 426 | Biology | 22 | 1.9K | 39 | 38 |
| 427 | Plant Ecology | 2 | 1.9K | 30 | 7 |
| 428 | Chemical Engineering | 6 | 1.8K | 106 | 27 |
| 429 | Oceanography | 26 | 1.8K | 32 | 28 |
| 430 | Chemistry | 3 | 1.8K | 6 | 2 |
| 431 | Chemistry | 34 | 1.8K | 31 | 26 |
| 432 | Ecology | 17 | 1.8K | 63 | 56 |
| 433 | Environmental Engineering | 10 | 1.8K | 34 | 16 |
| 434 | Education | 33 | 1.8K | 80 | 57 |
| 435 | Chemical Engineering | 16 | 1.8K | 67 | 39 |
| 436 | Physical Chemistry | 27 | 1.8K | 24 | 21 |
| 436 | Atmospheric Science | 24 | 1.8K | 48 | 49 |
| 438 | Nanotechnology | 18 | 1.8K | 6 | 12 |
| 439 | Chemical Engineering | 23 | 1.8K | 110 | 67 |
| 440 | Soil Science | 22 | 1.8K | 29 | 17 |
| 441 | Chemistry | 13 | 1.8K | 38 | 20 |
| 442 | Environmental Engineering | 36 | 1.8K | 6 | 6 |
| 443 | Environmental Science | 12 | 1.8K | 3 | 3 |
| 444 | Architecture | 13 | 1.8K | 12 | 8 |
| 444 | Civil Engineering | 13 | 1.8K | 12 | 8 |
| 446 | Environmental Engineering | 25 | 1.8K | 13 | 6 |
| 447 | Environmental Health | 23 | 1.8K | 12 | 10 |
| 448 | Chemical Engineering | 25 | 1.8K | 67 | 62 |
| 448 | Geography | 6 | 1.8K | 55 | 12 |
| 450 | Materials Science | 4 | 1.8K | 108 | 45 |
| 451 | Chemistry | 10 | 1.8K | 116 | 77 |
| 452 | Environmental Science | 5 | 1.7K | 26 | 4 |
| 453 | Chemical Engineering | 6 | 1.7K | 34 | 15 |
| 454 | Environmental Engineering | 7 | 1.7K | 16 | 8 |
| 455 | Biology | 5 | 1.7K | 155 | 49 |
| 456 | Chemistry | 17 | 1.7K | 17 | 16 |
| 457 | Environmental Engineering | 24 | 1.7K | 5 | 7 |
| 457 | Environmental Engineering | 21 | 1.7K | 14 | 7 |
| 459 | Chemistry | 25 | 1.7K | 78 | 57 |
| 460 | Chemical Engineering | 14 | 1.7K | 34 | 9 |
| 461 | Petrology | 14 | 1.7K | 20 | 13 |
| 461 | Environmental Chemistry | 20 | 1.7K | 5 | 4 |
| 463 | Earth science | 10 | 1.7K | 31 | 16 |
| 464 | Planetary Science | 14 | 1.7K | 8 | 6 |
| 465 | Chemistry | 11 | 1.7K | 121 | 53 |
| 466 | Mechanical Engineering | 20 | 1.7K | 117 | 102 |
| 467 | Chemical Engineering | 18 | 1.7K | 48 | 31 |
| 468 | Civil Engineering | 21 | 1.7K | 20 | 11 |
| 469 | Ecology | 34 | 1.7K | 35 | 41 |
| 470 | Environmental Engineering | 23 | 1.7K | 40 | 34 |
| 471 | Environmental Engineering | 19 | 1.7K | 23 | 14 |
| 472 | Biology | 27 | 1.6K | 53 | 61 |
| 472 | Environmental Microbiology | 25 | 1.6K | 2 | 2 |
| 474 | Environmental Science | 15 | 1.6K | 15 | 8 |
| 475 | Meteorology | 19 | 1.6K | 24 | 25 |
| 476 | Environmental Science | 20 | 1.6K | 18 | 10 |
| 477 | Environmental Science | 3 | 1.6K | 9 | 4 |
| 478 | Environmental Engineering | 19 | 1.6K | 18 | 14 |
| 479 | Nanotechnology | 11 | 1.6K | 5 | 5 |
| 480 | Environmental Science | 14 | 1.6K | 21 | 13 |
| 481 | Statistics | 7 | 1.6K | 47 | 18 |
| 481 | Epidemiology | 7 | 1.6K | 62 | 25 |
| 483 | Chemistry | 19 | 1.6K | 116 | 75 |
| 484 | Ecology | 17 | 1.6K | 82 | 63 |
| 484 | Chemistry | 22 | 1.6K | 82 | 59 |
| 486 | Chemistry | 2 | 1.6K | 120 | 27 |
| 487 | Chemical Engineering | 12 | 1.6K | 74 | 47 |
| 487 | Nanotechnology | 30 | 1.6K | 4 | 5 |
| 489 | Ecology | 39 | 1.6K | 15 | 12 |
| 490 | Energy Engineering | 5 | 1.6K | 94 | 23 |
| 491 | Environmental Engineering | 21 | 1.6K | 24 | 18 |
| 492 | Civil Engineering | 15 | 1.6K | 33 | 17 |
| 493 | Quality Control | 17 | 1.6K | 11 | 6 |
| 494 | Occupational Health | 29 | 1.6K | 16 | 18 |
| 495 | Mechanical Engineering | 23 | 1.6K | 63 | 40 |
| 496 | Chemical Engineering | 10 | 1.6K | 44 | 26 |
| 497 | Chemistry | 20 | 1.6K | 39 | 28 |
| 497 | Environmental Chemistry | 14 | 1.6K | 6 | 4 |
| 499 | Chemistry | 17 | 1.6K | 79 | 44 |
| 499 | Chemistry | 23 | 1.6K | 82 | 65 |
| 501 | Chemical Engineering | 2 | 1.6K | 8 | 2 |
| 502 | Physiology | 1 | 1.6K | 79 | 2 |
| 503 | Chemical Engineering | 7 | 1.6K | 13 | 4 |
| 504 | Geochemistry | 12 | 1.6K | 8 | 10 |
| 505 | Civil Engineering | 21 | 1.6K | 16 | 18 |
| 506 | Architecture | 24 | 1.6K | 97 | 42 |
| 507 | Geochemistry | 11 | 1.6K | 15 | 9 |
| 508 | Chemistry | 5 | 1.6K | 59 | 15 |
| 509 | Environmental Engineering | 20 | 1.6K | 14 | 9 |
| 510 | Environmental Science | 33 | 1.6K | 11 | 9 |
| 511 | Microbiology | 19 | 1.5K | 45 | 44 |
| 512 | Epidemiology | 20 | 1.5K | 29 | 30 |
| 513 | Chemistry | 6 | 1.5K | 129 | 50 |
| 514 | Higher Education | 7 | 1.5K | 43 | 14 |
| 515 | Ecology | 20 | 1.5K | 56 | 53 |
| 515 | Environmental Engineering | 20 | 1.5K | 7 | 5 |
| 517 | Mathematics | 3 | 1.5K | 124 | 34 |
| 517 | Mathematics | 3 | 1.5K | 153 | 38 |
| 519 | Environmental Science | 16 | 1.5K | 25 | 8 |
| 520 | Mathematics | 5 | 1.5K | 78 | 18 |
| 521 | Materials Science | 12 | 1.5K | 76 | 32 |
| 522 | Chemistry | 26 | 1.5K | 57 | 54 |
| 523 | Biochemistry | 16 | 1.5K | 44 | 25 |
| 524 | Epidemiology | 27 | 1.5K | 83 | 63 |
| 525 | Occupational Health | 28 | 1.5K | 46 | 42 |
| 526 | Chemical Engineering | 9 | 1.5K | 58 | 16 |
| 527 | Epidemiology | 13 | 1.5K | 48 | 16 |
| 528 | Chemistry | 9 | 1.5K | 96 | 49 |
| 529 | Environmental Toxicology | 11 | 1.5K | 26 | 13 |
| 530 | Environmental Health | 4 | 1.5K | 29 | 7 |
| 531 | Public Health | 17 | 1.5K | 114 | 60 |
| 531 | Microbiology | 30 | 1.5K | 24 | 38 |
| 533 | Environmental Health | 19 | 1.5K | 15 | 12 |
| 534 | Biostatistics | 12 | 1.5K | 49 | 18 |
| 535 | Materials Science | 17 | 1.5K | 44 | 35 |
| 536 | Geography | 23 | 1.5K | 20 | 10 |
| 537 | Public Health | 18 | 1.5K | 75 | 33 |
| 538 | Chemistry | 28 | 1.5K | 68 | 64 |
| 539 | Biochemistry | 7 | 1.5K | 134 | 50 |
| 540 | Education | 7 | 1.5K | 41 | 11 |
| 541 | Civil Engineering | 13 | 1.5K | 113 | 53 |
| 542 | Environmental Toxicology | 23 | 1.4K | 7 | 5 |
| 543 | Hydrogeology | 23 | 1.4K | 12 | 10 |
| 544 | Education | 34 | 1.4K | 46 | 31 |
| 545 | Environmental Science | 18 | 1.4K | 10 | 6 |
| 546 | Biostatistics | 26 | 1.4K | 60 | 50 |
| 547 | Microbiology | 17 | 1.4K | 24 | 25 |
| 548 | Mechanical Engineering | 21 | 1.4K | 80 | 68 |
| 548 | Environmental Toxicology | 32 | 1.4K | 9 | 16 |
| 550 | Ecology | 27 | 1.4K | 60 | 44 |
| 551 | Public Health | 10 | 1.4K | 99 | 31 |
| 552 | Environmental Science | 12 | 1.4K | 10 | 8 |
| 553 | Geography | 5 | 1.4K | 95 | 24 |
| 554 | Chemical Engineering | 17 | 1.4K | 43 | 44 |
| 554 | Environmental Science | 7 | 1.4K | 6 | 4 |
| 556 | Chemistry | 31 | 1.4K | 87 | 99 |
| 556 | Environmental Science | 8 | 1.4K | 5 | 4 |
| 558 | Chemistry | 11 | 1.4K | 51 | 24 |
| 559 | Environmental Engineering | 22 | 1.4K | 4 | 4 |
| 560 | Biochemistry | 11 | 1.4K | 7 | 4 |
| 561 | Biology | 12 | 1.4K | 68 | 43 |
| 562 | Biotechnology | 27 | 1.4K | 14 | 14 |
| 563 | Chemical Engineering | 16 | 1.4K | 28 | 27 |
| 564 | Chemistry | 6 | 1.4K | 80 | 37 |
| 565 | Chemistry | 19 | 1.4K | 45 | 26 |
| 566 | Biotechnology | 19 | 1.4K | 29 | 38 |
| 567 | Geography | 5 | 1.4K | 49 | 11 |
| 568 | Chemistry | 18 | 1.4K | 93 | 84 |
| 568 | Environmental Engineering | 20 | 1.4K | 31 | 18 |
| 570 | Environmental Science | 13 | 1.4K | 8 | 8 |
| 571 | Environmental Engineering | 13 | 1.4K | 18 | 12 |
| 572 | Sustainable Development | 12 | 1.4K | 66 | 44 |
| 573 | Public Health | 28 | 1.4K | 27 | 25 |
| 574 | Environmental Engineering | 6 | 1.4K | 31 | 4 |
| 574 | Petroleum Engineering | 5 | 1.4K | 52 | 23 |
| 576 | Environmental Health | 49 | 1.4K | 12 | 15 |
| 577 | Nuclear Energy | 5 | 1.4K | 71 | 18 |
| 578 | Public Health | 19 | 1.4K | 134 | 91 |
| 579 | Chemistry | 8 | 1.4K | 135 | 63 |
| 580 | Environmental Science | 27 | 1.3K | 35 | 44 |
| 581 | Civil Engineering | 22 | 1.3K | 38 | 28 |
| 582 | Environmental Toxicology | 3 | 1.3K | 11 | 4 |
| 582 | Chemistry | 8 | 1.3K | 4 | 4 |
| 584 | Hydrology | 23 | 1.3K | 5 | 7 |
| 585 | Environmental Engineering | 26 | 1.3K | 16 | 15 |
| 586 | Biology | 24 | 1.3K | 26 | 31 |
| 586 | Biology | 8 | 1.3K | 97 | 36 |
| 586 | Ecology | 1 | 1.3K | 28 | 7 |
| 589 | Materials Engineering | 15 | 1.3K | 14 | 8 |
| 590 | Environmental Engineering | 10 | 1.3K | 35 | 16 |
| 591 | Organic Chemistry | 4 | 1.3K | 33 | 6 |
| 592 | Civil Engineering | 23 | 1.3K | 15 | 13 |
| 593 | Dentistry | 2 | 1.3K | 79 | 20 |
| 593 | Dynamics | 16 | 1.3K | 38 | 28 |
| 593 | Ecology | 31 | 1.3K | 8 | 4 |
| 596 | Biology | 13 | 1.3K | 118 | 61 |
| 597 | Chemistry | 3 | 1.3K | 152 | 40 |
| 598 | Chemistry | 28 | 1.3K | 96 | 118 |
| 599 | Environmental Science | 11 | 1.3K | 5 | 5 |
| 600 | Materials Science | 5 | 1.3K | 110 | 51 |
| 600 | Nanotechnology | 11 | 1.3K | 3 | 3 |
| 602 | Chemistry | 3 | 1.3K | 152 | 42 |
| 603 | Public Health | 11 | 1.3K | 188 | 98 |
| 603 | Chemistry | 28 | 1.3K | 10 | 13 |
| 605 | Civil Engineering | 9 | 1.3K | 28 | 5 |
| 605 | Biochemistry | 17 | 1.3K | 43 | 22 |
| 607 | Environmental Science | 18 | 1.3K | 25 | 14 |
| 608 | Environmental Toxicology | 8 | 1.3K | 3 | 3 |
| 609 | Economics | 5 | 1.3K | 33 | 6 |
| 610 | Geography | 3 | 1.3K | 46 | 18 |
| 610 | Sustainable Engineering | 6 | 1.3K | 1 | 1 |
| 612 | Ecological Engineering | 10 | 1.3K | 19 | 14 |
| 613 | Chemistry | 9 | 1.3K | 62 | 38 |
| 614 | Environmental Engineering | 5 | 1.3K | 4 | 4 |
| 615 | Chemical Engineering | 14 | 1.3K | 94 | 58 |
| 616 | Chemistry | 15 | 1.3K | 17 | 12 |
| 617 | Public Health | 5 | 1.3K | 159 | 39 |
| 618 | Biochemistry | 27 | 1.3K | 8 | 12 |
| 619 | Biochemistry | 17 | 1.3K | 32 | 27 |
| 619 | Civil Engineering | 14 | 1.3K | 67 | 56 |
| 619 | Chemistry | 17 | 1.3K | 32 | 27 |
| 622 | Chemistry | 17 | 1.2K | 41 | 29 |
| 623 | Geochemistry | 3 | 1.2K | 9 | 5 |
| 623 | Geology | 7 | 1.2K | 53 | 21 |
| 623 | Geophysics | 7 | 1.2K | 53 | 19 |
| 626 | Public Health | 16 | 1.2K | 36 | 36 |
| 627 | Environmental Engineering | 24 | 1.2K | 34 | 33 |
| 628 | Environmental Engineering | 19 | 1.2K | 41 | 30 |
| 629 | Geography | 7 | 1.2K | 135 | 62 |
| 630 | Chemistry | 12 | 1.2K | 109 | 70 |
| 631 | Education | 18 | 1.2K | 173 | 87 |
| 632 | Environmental Engineering | 21 | 1.2K | 18 | 15 |
| 632 | Civil Engineering | 8 | 1.2K | 110 | 24 |
| 632 | Architecture | 8 | 1.2K | 110 | 24 |
| 635 | Hydrology | 24 | 1.2K | 24 | 26 |
| 636 | Biology | 14 | 1.2K | 95 | 69 |
| 637 | Education | 18 | 1.2K | 157 | 96 |
| 638 | Geology | 10 | 1.2K | 53 | 37 |
| 638 | Geophysics | 10 | 1.2K | 51 | 37 |
| 638 | Environmental Engineering | 32 | 1.2K | 44 | 59 |
| 641 | Environmental Science | 10 | 1.2K | 11 | 7 |
| 642 | Microbiology | 10 | 1.2K | 58 | 31 |
| 643 | Chemistry | 2 | 1.2K | 125 | 34 |
| 643 | Geochemistry | 2 | 1.2K | 1 | 1 |
| 645 | Environmental Chemistry | 13 | 1.2K | 2 | 2 |
| 646 | Ecology | 3 | 1.2K | 116 | 39 |
| 647 | Biology | 19 | 1.2K | 25 | 32 |
| 648 | Environmental Science | 19 | 1.2K | 15 | 16 |
| 649 | Biotechnology | 2 | 1.2K | 110 | 18 |
| 650 | Chemistry | 19 | 1.2K | 50 | 42 |
| 651 | Mechanical Engineering | 22 | 1.2K | 93 | 95 |
| 651 | Chemical Engineering | 11 | 1.2K | 45 | 29 |
| 651 | Epidemiology | 2 | 1.2K | 93 | 18 |
| 654 | Toxicology | 22 | 1.2K | 20 | 22 |
| 655 | Civil Engineering | 17 | 1.2K | 26 | 24 |
| 656 | Petroleum Engineering | 22 | 1.2K | 39 | 34 |
| 656 | Biology | 10 | 1.2K | 19 | 6 |
| 658 | Epidemiology | 23 | 1.2K | 133 | 148 |
| 659 | Civil Engineering | 10 | 1.2K | 24 | 13 |
| 660 | Catalysis | 1 | 1.2K | 106 | 33 |
| 661 | Geochemistry | 15 | 1.2K | 7 | 4 |
| 662 | Chemical Engineering | 14 | 1.2K | 78 | 64 |
| 662 | Environmental Science | 8 | 1.2K | 16 | 15 |
| 664 | Materials Science | 13 | 1.2K | 90 | 75 |
| 664 | Catalysis | 6 | 1.2K | 46 | 15 |
| 666 | Dynamics | 3 | 1.2K | 17 | 9 |
| 666 | Plasma Physics | 6 | 1.2K | 1 | 1 |
| 668 | Ecology | 10 | 1.2K | 65 | 45 |
| 669 | Biology | 7 | 1.2K | 27 | 4 |
| 670 | Chemistry | 23 | 1.2K | 17 | 15 |
| 671 | Chemistry | 22 | 1.2K | 63 | 46 |
| 671 | Environmental Engineering | 12 | 1.2K | 20 | 11 |
| 673 | Public Health | 15 | 1.2K | 37 | 25 |
| 674 | Global Health | 3 | 1.2K | 84 | 15 |
| 675 | Marine Ecology | 1 | 1.2K | 33 | 7 |
| 676 | Environmental Health | 11 | 1.2K | 24 | 14 |
| 677 | Environmental Health | 20 | 1.1K | 16 | 20 |
| 677 | Biology | 5 | 1.1K | 53 | 7 |
| 679 | Public Health | 10 | 1.1K | 90 | 32 |
| 680 | Environmental Engineering | 17 | 1.1K | 14 | 18 |
| 681 | Chemistry | 1 | 1.1K | 218 | 48 |
| 682 | Chemistry | 3 | 1.1K | 65 | 16 |
| 682 | Environmental Engineering | 7 | 1.1K | 45 | 20 |
| 684 | Analytical Chemistry | 16 | 1.1K | 16 | 10 |
| 685 | Microbial Ecology | 13 | 1.1K | 21 | 25 |
| 686 | Biology | 1 | 1.1K | 93 | 6 |
| 687 | Biology | 10 | 1.1K | 128 | 85 |
| 688 | Civil Engineering | 4 | 1.1K | 39 | 9 |
| 689 | Geochemistry | 13 | 1.1K | 8 | 6 |
| 690 | Environmental Engineering | 32 | 1.1K | 10 | 10 |
| 691 | Education | 5 | 1.1K | 58 | 18 |
| 691 | Catalysis | 5 | 1.1K | 60 | 19 |
| 691 | Materials Science | 5 | 1.1K | 63 | 21 |
| 694 | Landscape Ecology | 2 | 1.1K | 8 | 4 |
| 695 | Atmospheric Science | 8 | 1.1K | 7 | 7 |
| 696 | Chemistry | 11 | 1.1K | 149 | 91 |
| 697 | Chemistry | 11 | 1.1K | 106 | 74 |
| 698 | Biology | 5 | 1.1K | 44 | 11 |
| 699 | Environmental Engineering | 13 | 1.1K | 4 | 3 |
| 700 | Chemical Engineering | 2 | 1.1K | 26 | 10 |
| 700 | Chemistry | 5 | 1.1K | 104 | 42 |
| 702 | Environmental Engineering | 8 | 1.1K | 62 | 14 |
| 703 | Bioengineering | 10 | 1.1K | 40 | 25 |
| 704 | Environmental Engineering | 12 | 1.1K | 53 | 36 |
| 705 | Environmental Engineering | 5 | 1.1K | 11 | 6 |
| 705 | Chemistry | 12 | 1.1K | 114 | 70 |
| 707 | Public Health | 18 | 1.1K | 61 | 42 |
| 707 | Chemistry | 13 | 1.1K | 106 | 76 |
| 707 | Municipal Engineering | 17 | 1.1K | 25 | 16 |
| 710 | Biostatistics | 17 | 1.1K | 126 | 117 |
| 710 | Environmental Engineering | 9 | 1.1K | 20 | 5 |
| 712 | Biochemistry | 13 | 1.1K | 99 | 68 |
| 712 | Chemistry | 23 | 1.1K | 76 | 78 |
| 714 | Mechanical Engineering | 2 | 1.1K | 161 | 49 |
| 715 | Soil Science | 1 | 1.1K | 1 | 1 |
| 716 | Physical Chemistry | 8 | 1.1K | 40 | 23 |
| 717 | Analytical Chemistry | 14 | 1.1K | 19 | 10 |
| 718 | Biology | 3 | 1.1K | 69 | 17 |
| 719 | Chemical Engineering | 2 | 1.1K | 15 | 3 |
| 720 | Economics | 15 | 1.1K | 20 | 6 |
| 720 | Environmental Health | 1 | 1.1K | 3 | 2 |
| 722 | Oceanography | 17 | 1.1K | 74 | 69 |
| 722 | Quality Control | 9 | 1.1K | 27 | 8 |
| 724 | Chemistry | 15 | 1.1K | 108 | 82 |
| 725 | Biomedical Engineering | 8 | 1.1K | 106 | 71 |
| 725 | Environmental Science | 13 | 1.1K | 19 | 12 |
| 725 | Dynamics | 12 | 1.1K | 4 | 4 |
| 728 | Chemistry | 17 | 1.1K | 41 | 38 |
| 729 | Chemistry | 20 | 1.1K | 105 | 92 |
| 730 | Chemistry | 11 | 1.0K | 90 | 69 |
| 731 | Public Health | 16 | 1.0K | 59 | 36 |
| 732 | Ecology | 5 | 1.0K | 120 | 48 |
| 732 | Oceanography | 15 | 1.0K | 52 | 42 |
| 732 | Systems Engineering | 7 | 1.0K | 80 | 34 |
| 732 | evolutionary biology | 5 | 1.0K | 119 | 48 |
| 736 | Forest Ecology | 9 | 1.0K | 2 | 2 |
| 736 | Environmental Science | 3 | 1.0K | 11 | 4 |
| 738 | Environmental Engineering | 7 | 1.0K | 3 | 3 |
| 739 | Agricultural Chemistry | 10 | 1.0K | 46 | 17 |
| 740 | Atmospheric Chemistry | 19 | 1.0K | 8 | 10 |
| 741 | Education | 2 | 1.0K | 258 | 54 |
| 742 | Chemical Engineering | 13 | 1.0K | 96 | 75 |
| 743 | Applied Physics | 18 | 1.0K | 18 | 16 |
| 744 | Genetics | 12 | 1.0K | 147 | 108 |
| 744 | Ecology | 12 | 1.0K | 63 | 53 |
| 746 | Chemistry | 11 | 1.0K | 60 | 43 |
| 746 | Mechanical Engineering | 7 | 1.0K | 124 | 64 |
| 748 | Geography | 7 | 1.0K | 56 | 28 |
| 749 | Chemical Engineering | 14 | 1.0K | 105 | 76 |
| 750 | Biology | 9 | 1.0K | 50 | 34 |
| 751 | Geology | 7 | 1.0K | 37 | 24 |
| 751 | Geophysics | 7 | 1.0K | 35 | 23 |
| 753 | Chemistry | 15 | 1.0K | 75 | 64 |
| 753 | Materials Science | 7 | 1.0K | 36 | 24 |
| 753 | Soil Science | 3 | 1.0K | 65 | 26 |
| 756 | Earth science | 15 | 1.0K | 59 | 46 |
| 757 | Epidemiology | 17 | 1.0K | 52 | 45 |
| 758 | Hydraulic Engineering | 6 | 1.0K | 10 | 4 |
| 759 | Chemistry | 14 | 1.0K | 114 | 55 |
| 759 | Analytical Chemistry | 6 | 1.0K | 16 | 5 |
| 761 | Chemistry | 7 | 1.0K | 142 | 65 |
| 761 | Public Health | 15 | 1.0K | 123 | 101 |
| 763 | Biology | 7 | 1.0K | 197 | 122 |
| 764 | Chemistry | 18 | 999 | 77 | 71 |
| 764 | Environmental Toxicology | 1 | 999 | 27 | 3 |
| 766 | Chemistry | 5 | 998 | 114 | 59 |
| 767 | Environmental Engineering | 4 | 997 | 16 | 4 |
| 768 | Chemistry | 11 | 996 | 82 | 64 |
| 768 | Environmental Health | 7 | 996 | 42 | 29 |
| 770 | Quality Management | 19 | 992 | 12 | 9 |
| 771 | Chemistry | 14 | 991 | 40 | 29 |
| 772 | Environmental Science | 3 | 986 | 18 | 10 |
| 773 | Education | 27 | 985 | 34 | 32 |
| 774 | Geography | 10 | 982 | 56 | 35 |
| 775 | Biology | 8 | 977 | 39 | 22 |
| 775 | Chemistry | 13 | 977 | 81 | 50 |
| 777 | Architecture | 12 | 976 | 38 | 20 |
| 777 | Catalysis | 4 | 976 | 42 | 16 |
| 779 | Oceanography | 9 | 974 | 34 | 25 |
| 780 | Environmental Engineering | 3 | 973 | 34 | 9 |
| 781 | Public Health | 6 | 972 | 284 | 120 |
| 782 | Geography | 9 | 971 | 33 | 27 |
| 782 | Environmental Science | 14 | 971 | 23 | 18 |
| 784 | Chemistry | 3 | 968 | 148 | 50 |
| 785 | Ecology | 15 | 965 | 75 | 65 |
| 785 | Chemical Engineering | 12 | 965 | 79 | 52 |
| 785 | evolutionary biology | 15 | 965 | 74 | 63 |
| 788 | Chemistry | 12 | 963 | 64 | 42 |
| 789 | Chemistry | 14 | 959 | 40 | 31 |
| 790 | Materials Science | 7 | 958 | 119 | 77 |
| 791 | Chemistry | 14 | 955 | 75 | 60 |
| 791 | Biochemistry | 12 | 955 | 70 | 50 |
| 793 | Chemical Engineering | 11 | 954 | 85 | 61 |
| 794 | Civil Engineering | 12 | 949 | 16 | 8 |
| 795 | Chemical Engineering | 21 | 948 | 67 | 83 |
| 795 | Atmospheric Science | 12 | 948 | 15 | 12 |
| 797 | Public Health | 19 | 946 | 49 | 45 |
| 797 | Public Health | 19 | 946 | 50 | 46 |
| 799 | Environmental Chemistry | 16 | 945 | 4 | 4 |
| 800 | Chemical Engineering | 14 | 944 | 116 | 94 |
| 800 | Chemistry | 10 | 944 | 7 | 2 |
| 800 | Obstetrics | 18 | 944 | 64 | 70 |
| 803 | Physiology | 4 | 942 | 126 | 58 |
| 804 | Chemistry | 12 | 940 | 116 | 93 |
| 805 | Public Health | 15 | 939 | 103 | 53 |
| 806 | Chemical Engineering | 3 | 937 | 169 | 53 |
| 807 | Immunology | 11 | 936 | 47 | 38 |
| 807 | Microbiology | 11 | 936 | 52 | 30 |
| 809 | Environmental Engineering | 11 | 933 | 43 | 34 |
| 810 | Education | 2 | 929 | 41 | 3 |
| 810 | Toxicology | 6 | 929 | 95 | 33 |
| 812 | Marine Biology | 14 | 928 | 40 | 36 |
| 812 | Agricultural Microbiology | 19 | 928 | 71 | 66 |
| 814 | Architecture | 3 | 927 | 55 | 13 |
| 815 | Public Policy | 6 | 926 | 30 | 19 |
| 816 | Chemistry | 12 | 925 | 66 | 46 |
| 817 | Chemistry | 12 | 924 | 31 | 14 |
| 817 | Environmental Health | 3 | 924 | 13 | 6 |
| 819 | Chemical Engineering | 11 | 923 | 62 | 57 |
| 819 | Environmental Science | 11 | 923 | 11 | 7 |
| 821 | Biology | 1 | 922 | 29 | 3 |
| 821 | Environmental Science | 1 | 922 | 24 | 3 |
| 823 | Chemistry | 17 | 917 | 59 | 49 |
| 823 | Chemistry | 15 | 917 | 119 | 91 |
| 823 | Environmental Science | 12 | 917 | 12 | 9 |
| 826 | Environmental Science | 7 | 916 | 5 | 3 |
| 827 | Public Health | 27 | 914 | 157 | 189 |
| 827 | Biology | 4 | 914 | 106 | 34 |
| 827 | Chemistry | 17 | 914 | 64 | 60 |
| 830 | Oceanography | 7 | 908 | 65 | 36 |
| 831 | Occupational Health | 11 | 907 | 8 | 4 |
| 832 | Systems Engineering | 15 | 904 | 17 | 17 |
| 833 | Chemical Engineering | 13 | 901 | 42 | 33 |
| 834 | Chemistry | 6 | 900 | 137 | 81 |
| 835 | Toxicology | 11 | 897 | 43 | 40 |
| 836 | Soil Science | 5 | 896 | 7 | 5 |
| 837 | Chemistry | 1 | 887 | 108 | 17 |
| 837 | Public Health | 4 | 887 | 146 | 58 |
| 837 | Petroleum Engineering | 1 | 887 | 4 | 3 |
| 840 | Biology | 16 | 886 | 14 | 13 |
| 840 | Pharmacology | 16 | 886 | 10 | 7 |
| 842 | Chemistry | 7 | 884 | 54 | 26 |
| 843 | Chemistry | 8 | 883 | 250 | 146 |
| 843 | Biochemistry | 8 | 883 | 35 | 12 |
| 845 | Biostatistics | 13 | 881 | 55 | 47 |
| 846 | Environmental Toxicology | 15 | 880 | 13 | 6 |
| 847 | Chemistry | 4 | 879 | 13 | 3 |
| 847 | Microbial Ecology | 5 | 879 | 8 | 7 |
| 849 | Education | 19 | 878 | 152 | 87 |
| 850 | Biochemistry | 16 | 877 | 70 | 55 |
| 850 | Environmental Science | 6 | 877 | 32 | 16 |
| 852 | Chemistry | 16 | 876 | 70 | 64 |
| 853 | Chemistry | 16 | 874 | 49 | 33 |
| 854 | Materials Science | 11 | 873 | 86 | 95 |
| 854 | Chemical Engineering | 17 | 873 | 74 | 72 |
| 854 | Biochemistry | 8 | 873 | 17 | 6 |
| 854 | Environmental Engineering | 21 | 873 | 16 | 10 |
| 854 | Environmental Policy | 13 | 873 | 35 | 38 |
| 859 | Chemistry | 8 | 871 | 102 | 66 |
| 860 | Occupational Health | 10 | 870 | 52 | 41 |
| 861 | Nanotechnology | 2 | 869 | 3 | 2 |
| 862 | Civil Engineering | 7 | 868 | 29 | 10 |
| 862 | Ecology | 10 | 868 | 43 | 33 |
| 862 | Environmental Science | 10 | 868 | 15 | 11 |
| 865 | Environmental Engineering | 10 | 866 | 13 | 6 |
| 866 | Film | 3 | 865 | 31 | 9 |
| 867 | Public Health | 13 | 861 | 32 | 26 |
| 868 | Chemical Engineering | 4 | 857 | 121 | 50 |
| 869 | Chemical Engineering | 4 | 856 | 79 | 32 |
| 869 | Biochemistry | 12 | 856 | 62 | 52 |
| 871 | Environmental Science | 11 | 855 | 5 | 9 |
| 872 | Geochemistry | 11 | 853 | 34 | 29 |
| 872 | Biology | 4 | 853 | 34 | 18 |
| 872 | Environmental Science | 11 | 853 | 13 | 7 |
| 875 | Biotechnology | 7 | 852 | 57 | 43 |
| 876 | Civil Engineering | 11 | 848 | 45 | 29 |
| 877 | Chemical Engineering | 2 | 846 | 141 | 44 |
| 878 | Biology | 17 | 845 | 71 | 85 |
| 878 | Ecology | 9 | 845 | 57 | 48 |
| 880 | Biotechnology | 11 | 840 | 108 | 71 |
| 880 | Microbiology | 5 | 840 | 15 | 8 |
| 882 | Chemistry | 11 | 839 | 113 | 97 |
| 882 | Chemical Engineering | 10 | 839 | 118 | 80 |
| 884 | Chemistry | 8 | 837 | 6 | 2 |
| 884 | Environmental Science | 9 | 837 | 15 | 10 |
| 886 | Soil Science | 20 | 836 | 28 | 31 |
| 887 | Ecology | 9 | 832 | 105 | 71 |
| 887 | Environmental Engineering | 9 | 832 | 21 | 17 |
| 887 | Education | 8 | 832 | 51 | 27 |
| 887 | Environmental Engineering | 11 | 832 | 8 | 6 |
| 891 | Earth science | 7 | 829 | 25 | 25 |
| 892 | Chemical Engineering | 13 | 827 | 96 | 68 |
| 893 | Geology | 6 | 825 | 66 | 38 |
| 893 | Statistics | 6 | 825 | 20 | 5 |
| 895 | Environmental Engineering | 19 | 824 | 48 | 42 |
| 896 | Microbiology | 15 | 823 | 31 | 30 |
| 896 | Hydrology | 15 | 823 | 13 | 11 |
| 898 | Chemistry | 14 | 821 | 44 | 28 |
| 898 | Biochemistry | 14 | 821 | 37 | 26 |
| 900 | Biochemistry | 9 | 820 | 4 | 2 |
| 900 | Atmospheric Chemistry | 4 | 820 | 12 | 7 |
| 902 | Environmental Engineering | 12 | 817 | 11 | 5 |
| 903 | Statistics | 4 | 815 | 82 | 36 |
| 904 | Chemistry | 16 | 814 | 117 | 107 |
| 904 | Environmental Science | 14 | 814 | 24 | 9 |
| 906 | Civil Engineering | 5 | 810 | 32 | 11 |
| 906 | Civil Engineering | 11 | 810 | 19 | 6 |
| 908 | Anatomy | 7 | 808 | 40 | 32 |
| 908 | Geography | 2 | 808 | 156 | 25 |
| 910 | Ecology | 20 | 807 | 33 | 44 |
| 911 | Chemistry | 8 | 806 | 127 | 68 |
| 911 | Nanotechnology | 7 | 806 | 7 | 8 |
| 913 | Geology | 13 | 801 | 27 | 18 |
| 913 | Geophysics | 13 | 801 | 25 | 18 |
| 915 | Analytical Chemistry | 7 | 800 | 37 | 16 |
| 915 | Environmental Toxicology | 4 | 800 | 33 | 6 |
| 917 | Environmental Engineering | 15 | 796 | 4 | 4 |
| 918 | Materials Science | 3 | 794 | 117 | 48 |
| 919 | Chemistry | 23 | 793 | 80 | 99 |
| 920 | Chemical Engineering | 1 | 792 | 56 | 10 |
| 920 | Environmental Health | 9 | 792 | 10 | 17 |
| 922 | Materials Engineering | 7 | 791 | 63 | 48 |
| 923 | Genetics | 13 | 790 | 56 | 55 |
| 924 | Chemistry | 9 | 787 | 146 | 99 |
| 925 | Environmental Engineering | 8 | 786 | 6 | 4 |
| 925 | Civil Engineering | 6 | 786 | 49 | 20 |
| 927 | Analytical Chemistry | 10 | 785 | 31 | 20 |
| 927 | Toxicology | 22 | 785 | 15 | 15 |
| 929 | Chemistry | 10 | 784 | 71 | 48 |
| 930 | Biophysics | 5 | 782 | 42 | 9 |
| 930 | Soil Science | 9 | 782 | 32 | 28 |
| 930 | Nuclear Physics | 5 | 782 | 32 | 10 |
| 933 | Environmental Chemistry | 6 | 777 | 19 | 10 |
| 934 | Physiology | 1 | 775 | 109 | 27 |
| 934 | Civil Engineering | 12 | 775 | 18 | 13 |
| 934 | Architecture | 12 | 775 | 18 | 13 |
| 934 | Developmental Biology | 4 | 775 | 102 | 48 |
| 938 | Chemical Engineering | 8 | 774 | 52 | 14 |
| 939 | Oceanography | 16 | 773 | 25 | 21 |
| 939 | Environmental Engineering | 6 | 773 | 13 | 10 |
| 941 | Nutrition | 9 | 770 | 30 | 15 |
| 942 | Environmental Engineering | 10 | 769 | 18 | 15 |
| 943 | Physical Chemistry | 3 | 767 | 129 | 71 |
| 944 | Ecophysiology | 15 | 764 | 18 | 16 |
| 945 | Geology | 8 | 763 | 29 | 22 |
| 946 | Public Health | 18 | 761 | 28 | 29 |
| 947 | Global Health | 2 | 760 | 61 | 12 |
| 948 | Biology | 12 | 758 | 188 | 167 |
| 949 | Geology | 12 | 757 | 28 | 25 |
| 950 | Civil Engineering | 1 | 756 | 15 | 4 |
| 950 | Soil Science | 1 | 756 | 6 | 1 |
| 952 | Microbiology | 13 | 755 | 12 | 15 |
| 953 | Environmental Engineering | 7 | 754 | 47 | 30 |
| 954 | Biology | 7 | 753 | 173 | 138 |
| 955 | Public Health | 12 | 751 | 22 | 17 |
| 956 | Environmental Engineering | 7 | 750 | 32 | 13 |
| 956 | Applied Mathematics | 2 | 750 | 137 | 44 |
| 956 | Soil Science | 4 | 750 | 19 | 7 |
| 959 | Chemistry | 9 | 749 | 44 | 29 |
| 960 | Materials Engineering | 11 | 748 | 97 | 73 |
| 960 | Environmental Engineering | 12 | 748 | 19 | 15 |
| 962 | Epidemiology | 6 | 746 | 182 | 102 |
| 963 | Materials Science | 5 | 745 | 107 | 70 |
| 963 | Chemical Engineering | 15 | 745 | 31 | 32 |
| 965 | Cell Biology | 5 | 743 | 81 | 49 |
| 965 | Biochemistry | 5 | 743 | 90 | 52 |
| 967 | Mechanical Engineering | 5 | 742 | 120 | 70 |
| 967 | Civil Engineering | 9 | 742 | 73 | 39 |
| 969 | Chemistry | 12 | 741 | 67 | 48 |
| 970 | Chemical Engineering | 2 | 740 | 54 | 22 |
| 971 | Sustainable Engineering | 1 | 739 | 1 | 1 |
| 972 | Chemical Engineering | 6 | 738 | 28 | 19 |
| 972 | Chemistry | 23 | 738 | 83 | 93 |
| 972 | Biostatistics | 5 | 738 | 181 | 112 |
| 975 | Chemistry | 20 | 737 | 38 | 33 |
| 976 | Chemical Engineering | 12 | 734 | 62 | 53 |
| 976 | Chemistry | 16 | 734 | 8 | 13 |
| 976 | Environmental Science | 5 | 734 | 15 | 6 |
| 979 | Sustainable Engineering | 8 | 731 | 8 | 8 |
| 980 | Biochemistry | 13 | 730 | 36 | 38 |
| 980 | Environmental Chemistry | 9 | 730 | 9 | 13 |
| 982 | Chemistry | 14 | 729 | 78 | 61 |
| 983 | Education | 17 | 728 | 189 | 133 |
| 984 | Environmental Science | 12 | 727 | 6 | 12 |
| 985 | Environmental Engineering | 9 | 726 | 30 | 22 |
| 986 | Chemistry | 14 | 725 | 40 | 40 |
| 987 | Green Chemistry | 1 | 724 | 1 | 1 |
| 988 | Petroleum Engineering | 6 | 723 | 32 | 24 |
| 988 | Analytical Chemistry | 13 | 723 | 20 | 13 |
| 990 | Public Health | 5 | 720 | 53 | 19 |
| 990 | Environmental Health | 5 | 720 | 11 | 3 |
| 990 | Environmental Health | 22 | 720 | 35 | 57 |
| 990 | Environmental Engineering | 3 | 720 | 20 | 4 |
| 994 | Chemistry | 4 | 718 | 3 | 3 |
| 994 | Materials Science | 7 | 718 | 90 | 53 |
| 994 | Cell Biology | 10 | 718 | 67 | 57 |
| 994 | Anatomy | 10 | 718 | 67 | 57 |
| 998 | Pediatrics | 15 | 716 | 56 | 50 |
| 999 | Biology | 18 | 715 | 82 | 80 |
| 1000 | Environmental Health | 10 | 714 | 28 | 33 |