| # | Discipline | Articles | Citations | R ARank | R CRank |
|---|
| 1 | Pollution | 314 | 25,591 | 69 | 40 |
| 2 | Environmental Health | 255 | 22,784 | 104 | 50 |
| 3 | Environmental Engineering | 195 | 17,424 | 52 | 35 |
| 4 | Ecology | 186 | 12,951 | 390 | 407 |
| 5 | sanitation | 128 | 12,086 | 53 | 48 |
| 6 | environmental pollution | 157 | 10,581 | 90 | 44 |
| 7 | Hydrology | 219 | 9,993 | 11 | 13 |
| 8 | Geophysics | 239 | 9,287 | 122 | 118 |
| 9 | Environment | 86 | 9,257 | 328 | 220 |
| 10 | Science | 102 | 8,337 | 2.7K | 3.9K |
| 11 | Environmental monitoring | 133 | 8,210 | 60 | 37 |
| 12 | Atmospheric Physics | 177 | 7,320 | 52 | 68 |
| 13 | Biology | 150 | 7,239 | 1.7K | 3.9K |
| 14 | Atmospheric Chemistry | 154 | 6,833 | 31 | 66 |
| 15 | Toxicology | 50 | 6,394 | 834 | 118 |
| 16 | environmental protection | 58 | 6,360 | 104 | 30 |
| 17 | Geography | 137 | 5,740 | 37 | 31 |
| 18 | Climatology | 116 | 5,529 | 59 | 80 |
| 19 | Physics | 85 | 5,474 | 2.4K | 4.3K |
| 20 | Environmental Policy | 65 | 5,415 | 54 | 30 |
| 21 | Environmental Law | 41 | 4,485 | 68 | 21 |
| 22 | Chemistry | 71 | 4,254 | 4.6K | 3.8K |
| 23 | Geology | 138 | 4,220 | 119 | 120 |
| 24 | Meteorology | 120 | 4,099 | 76 | 137 |
| 25 | Nanotechnology | 94 | 3,994 | 1.1K | 1.4K |
| 26 | Environmental Chemistry | 32 | 3,490 | 225 | 197 |
| 27 | Water | 64 | 3,430 | 106 | 148 |
| 28 | Biodiversity conservation | 36 | 3,080 | 254 | 227 |
| 29 | pollutants | 16 | 3,064 | 390 | 41 |
| 29 | Environmental pollutants | 16 | 3,064 | 582 | 51 |
| 31 | Earth Sciences | 61 | 2,888 | 130 | 104 |
| 32 | Natural history | 29 | 2,699 | 1.6K | 5.3K |
| 33 | Climate change | 26 | 2,690 | 166 | 202 |
| 33 | Eutrophication | 26 | 2,690 | 166 | 202 |
| 35 | Water pollution | 40 | 2,604 | 249 | 198 |
| 36 | Human Geography | 72 | 2,405 | 26 | 39 |
| 37 | Paleontology | 113 | 2,365 | 42 | 55 |
| 38 | freshwater biology | 25 | 2,314 | 61 | 28 |
| 39 | rivers | 26 | 2,114 | 1 | 1 |
| 40 | Aquatic ecology | 50 | 2,100 | 15 | 6 |
| 41 | Geomorphology | 26 | 1,889 | 29 | 22 |
| 42 | Medicine | 52 | 1,756 | 6.8K | 11.3K |
| 43 | Technology | 50 | 1,728 | 344 | 384 |
| 44 | ecosystem | 21 | 1,720 | 189 | 133 |
| 45 | Research | 39 | 1,701 | 6.8K | 5.8K |
| 46 | water supply | 52 | 1,605 | 53 | 110 |
| 47 | Public Health | 19 | 1,538 | 3.6K | 1.7K |
| 48 | Planets | 44 | 1,512 | 272 | 365 |
| 49 | Ecohydrology | 37 | 1,507 | 2 | 1 |
| 50 | atmospheric models | 27 | 1,379 | 81 | 71 |
| 51 | biological monitoring | 34 | 1,259 | 10 | 13 |
| 52 | Botany | 32 | 1,223 | 1.7K | 2.1K |
| 53 | Zoology | 16 | 1,169 | 992 | 329 |
| 54 | bioclimatology | 22 | 1,038 | 55 | 36 |
| 55 | Epidemiology | 12 | 1,031 | 3.7K | 1.7K |
| 56 | Physical Geography | 23 | 922 | 20 | 27 |
| 57 | Nanostructures | 10 | 882 | 1.0K | 791 |
| 58 | city planning | 40 | 876 | 41 | 96 |
| 59 | Biodiversity | 32 | 870 | 326 | 583 |
| 60 | Animal ecology | 3 | 839 | 1.8K | 363 |
| 61 | Paleoclimatology | 17 | 826 | 43 | 33 |
| 62 | Social Sciences | 16 | 822 | 539 | 194 |
| 63 | Biogeography | 25 | 767 | 164 | 429 |
| 64 | Plant Ecology | 17 | 704 | 499 | 679 |
| 65 | Regional Planning | 28 | 698 | 127 | 205 |
| 66 | Marine Biology | 20 | 672 | 715 | 709 |
| 67 | Sedimentology | 16 | 665 | 70 | 96 |
| 68 | Radiation | 14 | 661 | 322 | 167 |
| 69 | Economic Development | 7 | 591 | 362 | 187 |
| 70 | Sustainable Development | 14 | 583 | 137 | 240 |
| 71 | Groundwater | 17 | 535 | 112 | 68 |
| 72 | Environmental Management | 19 | 519 | 359 | 1.1K |
| 73 | nanoscience | 11 | 515 | 3.3K | 4.1K |
| 74 | Nanoparticles | 14 | 513 | 1.1K | 1.4K |
| 75 | Analytical Chemistry | 17 | 511 | 3.7K | 4.1K |
| 76 | Volcanoes | 7 | 500 | 50 | 31 |
| 77 | sustainability | 9 | 492 | 63 | 125 |
| 78 | occupational diseases | 7 | 490 | 560 | 277 |
| 79 | Hydrogeology | 19 | 470 | 45 | 37 |
| 80 | Biogeochemistry | 22 | 459 | 144 | 430 |
| 81 | Plant physiology | 5 | 451 | 3.1K | 2.0K |
| 82 | Molecular Biology | 14 | 440 | 20.4K | 27.1K |
| 83 | plant molecular biology | 3 | 408 | 3.6K | 2.4K |
| 84 | population geography | 4 | 392 | 129 | 39 |
| 85 | Biotechnology | 11 | 390 | 9.3K | 12.4K |
| 86 | global environmental change | 9 | 387 | 100 | 138 |
| 87 | Agricultural Chemistry | 3 | 380 | 6.1K | 2.2K |
| 87 | Nanostructured Materials | 11 | 380 | 3.9K | 4.3K |
| 89 | Climate | 8 | 377 | 78 | 76 |
| 89 | weather | 10 | 377 | 53 | 64 |
| 91 | natural disasters | 10 | 373 | 223 | 227 |
| 92 | emergency management | 10 | 369 | 85 | 59 |
| 93 | Metallurgy | 12 | 357 | 791 | 545 |
| 94 | Economic Geography | 14 | 347 | 28 | 62 |
| 95 | Electrochemistry | 11 | 343 | 2.1K | 1.6K |
| 96 | Land Use Planning | 7 | 337 | 103 | 135 |
| 96 | Geobiology | 8 | 337 | 145 | 86 |
| 98 | Engineering Geology | 15 | 336 | 259 | 356 |
| 99 | Evolution | 18 | 334 | 786 | 2.4K |
| 100 | Environmental Toxicology | 9 | 333 | 1.6K | 2.4K |
| 101 | Public Policy | 5 | 329 | 1.1K | 502 |
| 102 | Health Policy | 4 | 322 | 4.0K | 1.9K |
| 102 | health services accessibility | 4 | 322 | 828 | 236 |
| 104 | Geochemistry | 10 | 319 | 432 | 361 |
| 104 | Geomagnetism | 9 | 319 | 241 | 170 |
| 106 | environmental exposure | 8 | 312 | 910 | 937 |
| 107 | Biochemistry | 8 | 311 | 33.0K | 28.3K |
| 108 | recreation | 1 | 304 | 1.3K | 134 |
| 108 | Leisure | 1 | 304 | 385 | 31 |
| 110 | plant communities | 11 | 303 | 540 | 1.2K |
| 111 | air quality | 7 | 278 | 24 | 16 |
| 111 | cryosphere | 5 | 278 | 147 | 112 |
| 113 | Spectrum analysis | 3 | 277 | 6.8K | 2.6K |
| 113 | Fisheries | 6 | 277 | 663 | 471 |
| 113 | Plants | 3 | 277 | 4.8K | 3.2K |
| 116 | Data Mining | 14 | 276 | 88 | 690 |
| 116 | data collection | 14 | 276 | 38 | 477 |
| 118 | Microbial Ecology | 5 | 272 | 4.5K | 5.3K |
| 119 | Proteomics | 1 | 271 | 5.7K | 1.2K |
| 120 | Archaeology | 7 | 260 | 614 | 398 |
| 120 | Wetland ecology | 5 | 260 | 128 | 70 |
| 122 | Polymers | 1 | 259 | 24.4K | 6.1K |
| 123 | Developing countries | 3 | 253 | 2.0K | 630 |
| 124 | landscapes | 11 | 247 | 9 | 16 |
| 125 | Agriculture | 7 | 237 | 1.4K | 1.4K |
| 126 | Palynology | 9 | 227 | 40 | 23 |
| 127 | Hydrometeorology | 5 | 221 | 75 | 125 |
| 127 | biological evolution | 8 | 221 | 2.1K | 3.9K |
| 129 | Economics | 8 | 219 | 2.2K | 2.0K |
| 129 | Biomedical Engineering | 7 | 219 | 7.7K | 8.7K |
| 131 | Geopolitics | 11 | 215 | 15 | 23 |
| 132 | Sovereignty | 10 | 214 | 6 | 11 |
| 133 | Paleoecology | 14 | 208 | 47 | 115 |
| 134 | Microbiology | 4 | 207 | 25.4K | 24.3K |
| 135 | Astronomy | 4 | 205 | 3.5K | 2.3K |
| 136 | Petrology | 4 | 204 | 507 | 473 |
| 137 | Microscopy | 2 | 202 | 4.6K | 914 |
| 138 | Economic History | 13 | 201 | 885 | 927 |
| 139 | Biophysics | 4 | 195 | 29.2K | 17.6K |
| 140 | Architecture | 7 | 193 | 188 | 126 |
| 140 | Renewable Energy Sources | 3 | 193 | 1.5K | 2.1K |
| 140 | construction | 7 | 193 | 11 | 32 |
| 140 | energy development | 3 | 193 | 549 | 808 |
| 144 | Public Administration | 6 | 190 | 478 | 428 |
| 145 | Engineering | 6 | 188 | 4.1K | 2.8K |
| 146 | wetland management | 2 | 185 | 108 | 29 |
| 147 | Mathematics | 5 | 177 | 8.4K | 3.7K |
| 148 | Energy Policy | 4 | 175 | 637 | 611 |
| 148 | energy resources | 4 | 175 | 134 | 461 |
| 150 | polar regions | 5 | 173 | 361 | 293 |
| 151 | Occupational Health | 3 | 169 | 1.5K | 662 |
| 152 | Environmental Microbiology | 5 | 167 | 1.5K | 3.1K |
| 153 | miniaturization | 5 | 165 | 3.3K | 6.7K |
| 154 | Urban Geography | 4 | 161 | 88 | 69 |
| 155 | Developmental Biology | 3 | 154 | 7.7K | 9.5K |
| 156 | Landscape Ecology | 3 | 153 | 399 | 403 |
| 157 | Molecular evolution | 1 | 151 | 6.9K | 3.1K |
| 158 | Geographic information systems | 5 | 149 | 514 | 344 |
| 159 | Nanobiotechnology | 3 | 144 | 471 | 384 |
| 159 | Ecosystem management | 2 | 144 | 768 | 527 |
| 161 | Biocompatible Materials | 3 | 138 | 17.2K | 17.3K |
| 161 | Materials | 4 | 138 | 15.9K | 18.8K |
| 163 | Endocrinology | 1 | 136 | 29.4K | 18.2K |
| 163 | Diabetes mellitus | 1 | 136 | 14.7K | 9.0K |
| 163 | sedimentary basins | 2 | 136 | 153 | 91 |
| 163 | Metabolic diseases | 1 | 136 | 22.4K | 14.6K |
| 163 | Diabetes | 1 | 136 | 15.7K | 9.4K |
| 168 | Social Change | 1 | 134 | 635 | 248 |
| 169 | Pharmacology | 1 | 131 | 51.4K | 23.0K |
| 170 | Scandinavia | 4 | 127 | 612 | 550 |
| 171 | Anatomy | 10 | 125 | 2.4K | 8.0K |
| 171 | Marine Pollution | 4 | 125 | 591 | 1.1K |
| 171 | planning | 10 | 125 | 48 | 149 |
| 174 | Environmental Archaeology | 8 | 123 | 11 | 12 |
| 175 | History | 2 | 122 | 653 | 94 |
| 175 | Sociology | 5 | 122 | 2.3K | 3.5K |
| 175 | atmosphere | 7 | 122 | 78 | 112 |
| 178 | Plant Taxonomy | 4 | 120 | 375 | 337 |
| 179 | Waste management | 12 | 118 | 394 | 1.0K |
| 180 | soil management | 4 | 116 | 68 | 134 |
| 181 | Development Economics | 1 | 114 | 838 | 364 |
| 181 | poverty | 1 | 114 | 647 | 182 |
| 183 | Nationalism | 3 | 113 | 139 | 35 |
| 184 | Materials Science | 2 | 111 | 18.9K | 14.5K |
| 185 | Green Chemistry | 2 | 106 | 5.7K | 5.3K |
| 186 | Housing | 5 | 105 | 59 | 124 |
| 187 | housing policy | 3 | 101 | 27 | 30 |
| 188 | Eurasia | 3 | 99 | 56 | 20 |
| 189 | Higher Education | 12 | 98 | 48 | 285 |
| 189 | Water quality management | 7 | 98 | 991 | 1.8K |
| 191 | China | 10 | 97 | 1.7K | 3.2K |
| 192 | environmental issues | 3 | 91 | 205 | 280 |
| 193 | Aerosols | 7 | 90 | 135 | 418 |
| 194 | Latin America | 3 | 87 | 353 | 194 |
| 195 | Europe | 4 | 86 | 5.7K | 6.3K |
| 196 | soil pollution | 6 | 85 | 140 | 363 |
| 196 | international cooperation | 1 | 85 | 1.1K | 622 |
| 198 | Biogeochemical cycles | 5 | 82 | 249 | 1.3K |
| 198 | Scotland | 8 | 82 | 41 | 52 |
| 200 | Glaciology | 3 | 81 | 256 | 277 |
| 200 | glaciers | 3 | 81 | 248 | 277 |
| 202 | Urban Policy | 5 | 80 | 83 | 314 |
| 203 | Psychology | 3 | 78 | 13.8K | 18.0K |
| 203 | Paleobiology | 8 | 78 | 73 | 105 |
| 203 | Land use | 4 | 78 | 396 | 759 |
| 206 | ethnicity | 2 | 77 | 648 | 341 |
| 207 | Agricultural Economics | 1 | 76 | 268 | 157 |
| 208 | Feminism | 2 | 75 | 411 | 279 |
| 208 | Wetland conservation | 3 | 75 | 167 | 257 |
| 208 | Wetlands | 3 | 75 | 173 | 257 |
| 211 | Mineralogy | 3 | 73 | 1.4K | 1.7K |
| 211 | Wildlife conservation | 1 | 73 | 1.1K | 662 |
| 211 | Insects | 2 | 73 | 2.2K | 1.8K |
| 214 | soil conservation | 3 | 72 | 693 | 951 |
| 215 | Analytical Biochemistry | 3 | 67 | 2.4K | 3.2K |
| 216 | hygiene | 2 | 66 | 839 | 913 |
| 217 | Phytochemistry | 3 | 64 | 200 | 424 |
| 217 | Plant Morphology | 4 | 64 | 248 | 448 |
| 217 | Phytoremediation | 3 | 64 | 200 | 424 |
| 217 | environmental remediation | 3 | 64 | 253 | 484 |
| 217 | Bioreactors | 3 | 64 | 200 | 424 |
| 217 | Asia | 4 | 64 | 2.2K | 2.1K |
| 223 | Medical Anthropology | 2 | 61 | 2.5K | 3.6K |
| 223 | Water quality | 2 | 61 | 245 | 237 |
| 225 | Municipal Engineering | 2 | 60 | 251 | 361 |
| 225 | Micropaleontology | 6 | 60 | 8 | 45 |
| 225 | Primary health care | 2 | 60 | 3.9K | 3.6K |
| 228 | Entrepreneurship | 1 | 58 | 620 | 626 |
| 229 | Ethnology | 4 | 57 | 657 | 1.1K |
| 230 | United States | 6 | 56 | 8.2K | 17.6K |
| 231 | Bioengineering | 3 | 55 | 14.7K | 28.2K |
| 232 | air quality management | 3 | 54 | 280 | 783 |
| 232 | indoor air pollution | 3 | 54 | 410 | 867 |
| 232 | Ventilation | 3 | 54 | 569 | 1.0K |
| 232 | Sick building syndrome | 3 | 54 | 410 | 867 |
| 236 | Oceanography | 5 | 53 | 1.5K | 3.6K |
| 236 | Biochemical Engineering | 1 | 53 | 9.6K | 11.0K |
| 236 | Australia | 6 | 53 | 1.8K | 4.1K |
| 239 | Southeast Asia | 2 | 51 | 272 | 111 |
| 240 | Education | 6 | 50 | 2.8K | 6.7K |
| 241 | Culture | 2 | 49 | 1.2K | 989 |
| 242 | Water Purification | 5 | 48 | 856 | 2.0K |
| 243 | Agricultural Ecology | 2 | 47 | 2.0K | 3.8K |
| 243 | Bioremediation | 2 | 47 | 467 | 835 |
| 243 | Biodegradation | 2 | 47 | 464 | 820 |
| 243 | Water Microbiology | 2 | 47 | 578 | 1.1K |
| 243 | Fouling | 2 | 47 | 312 | 708 |
| 248 | visualization | 7 | 46 | 1.4K | 2.3K |
| 249 | Small Business | 1 | 45 | 479 | 730 |
| 249 | Chemical analysis | 1 | 45 | 4.4K | 3.8K |
| 249 | urban forestry | 3 | 45 | 96 | 354 |
| 252 | Freshwater invertebrates | 2 | 44 | 101 | 254 |
| 252 | drinking water | 1 | 44 | 247 | 83 |
| 252 | Water treatment | 1 | 44 | 13 | 11 |
| 255 | Mechanical Engineering | 1 | 43 | 6.7K | 2.9K |
| 255 | Ecological Genetics | 1 | 43 | 1.4K | 925 |
| 255 | Conservation Biology | 1 | 43 | 2.5K | 2.9K |
| 255 | Population Genetics | 1 | 43 | 4.7K | 6.0K |
| 255 | Paleoceanography | 2 | 43 | 209 | 644 |
| 255 | Carbon | 1 | 43 | 219 | 257 |
| 261 | Political Geography | 2 | 42 | 58 | 80 |
| 261 | Regional Economics | 3 | 42 | 254 | 467 |
| 263 | Humanities | 2 | 41 | 1.4K | 1.1K |
| 263 | Regionalism | 1 | 41 | 329 | 215 |
| 265 | water reuse | 1 | 40 | 590 | 499 |
| 265 | disease outbreaks | 1 | 40 | 2.0K | 2.4K |
| 265 | Epidemics | 1 | 40 | 1.8K | 2.3K |
| 265 | Argentina | 3 | 40 | 10 | 9 |
| 269 | land tenure | 2 | 38 | 25 | 80 |
| 269 | Land reform | 2 | 38 | 29 | 80 |
| 271 | Chemical Engineering | 1 | 36 | 16.2K | 15.8K |
| 272 | Urban Planning | 2 | 35 | 70 | 147 |
| 272 | Urban Renewal | 2 | 35 | 80 | 75 |
| 272 | Urban society | 2 | 35 | 44 | 49 |
| 275 | Developmental Psychology | 2 | 34 | 1.8K | 3.1K |
| 275 | Popular culture | 1 | 34 | 469 | 108 |
| 275 | cultural policy | 1 | 34 | 268 | 104 |
| 278 | Chromatography | 2 | 33 | 4.0K | 5.6K |
| 278 | weather forecasting | 2 | 33 | 144 | 354 |
| 278 | plankton | 1 | 33 | 371 | 433 |
| 278 | Chromatographic analysis | 2 | 33 | 5.1K | 6.5K |
| 282 | Fluid Dynamics | 1 | 32 | 2.3K | 1.6K |
| 282 | Globalization | 1 | 32 | 806 | 929 |
| 284 | Remote Sensing | 1 | 31 | 1.8K | 1.4K |
| 284 | Electrophoresis | 1 | 31 | 7.7K | 7.9K |
| 284 | Europa | 1 | 31 | 999 | 803 |
| 287 | Social policy | 4 | 30 | 440 | 1.4K |
| 288 | Systems Biology | 7 | 29 | 1.3K | 8.9K |
| 288 | Risk assessment | 2 | 29 | 623 | 1.0K |
| 288 | economic policy | 2 | 29 | 2.6K | 3.0K |
| 291 | Risk Management | 4 | 28 | 370 | 2.0K |
| 291 | Travel | 4 | 28 | 469 | 1.6K |
| 293 | environmental indicators | 1 | 27 | 218 | 648 |
| 293 | Ornithology | 1 | 27 | 2.5K | 2.2K |
| 293 | Birds | 1 | 27 | 3.0K | 2.6K |
| 296 | Environmental Geography | 1 | 26 | 40 | 27 |
| 296 | Multicultural Education | 3 | 26 | 182 | 456 |
| 296 | Food additives | 1 | 26 | 2.5K | 3.0K |
| 296 | food contamination | 1 | 26 | 3.2K | 3.0K |
| 300 | Strategic planning | 1 | 25 | 584 | 738 |
| 301 | Robotics | 1 | 24 | 4.6K | 4.5K |
| 301 | International Relations | 3 | 24 | 865 | 1.7K |
| 301 | Ethnic relations | 2 | 24 | 505 | 827 |
| 301 | Borderlands | 3 | 24 | 27 | 60 |
| 305 | Marine Ecology | 1 | 22 | 1.4K | 1.8K |
| 305 | Sustainable Engineering | 1 | 22 | 7.6K | 10.8K |
| 305 | ecological risk assessment | 1 | 22 | 595 | 757 |
| 305 | Health Risk Assessment | 1 | 22 | 1.0K | 1.1K |
| 309 | Environmental Geochemistry | 3 | 21 | 310 | 1.4K |
| 309 | Minerals | 3 | 21 | 431 | 1.7K |
| 309 | Entomology | 3 | 21 | 3.6K | 7.4K |
| 312 | Environmental Geology | 1 | 20 | 2.6K | 3.4K |
| 312 | animals | 1 | 20 | 4.0K | 4.1K |
| 314 | Soil Science | 1 | 19 | 3.9K | 5.2K |
| 314 | Green Technology | 1 | 19 | 741 | 1.1K |
| 314 | Soil | 1 | 19 | 297 | 591 |
| 317 | urban health | 1 | 18 | 743 | 1.2K |
| 317 | Prospecting | 1 | 18 | 180 | 229 |
| 319 | community development | 1 | 17 | 366 | 432 |
| 319 | organized crime | 1 | 17 | 96 | 145 |
| 319 | Environmental forensics | 2 | 17 | 55 | 176 |
| 322 | Emergency Medical Services | 1 | 16 | 2.3K | 2.9K |
| 322 | Crime prevention | 2 | 16 | 289 | 558 |
| 322 | hazard mitigation | 1 | 16 | 1.7K | 2.5K |
| 322 | corrections | 2 | 16 | 159 | 226 |
| 322 | Prisons | 2 | 16 | 237 | 445 |
| 322 | Cheminformatics | 2 | 16 | 485 | 1.8K |
| 322 | crime | 2 | 16 | 844 | 2.2K |
| 322 | Informatics | 2 | 16 | 2.0K | 5.2K |
| 330 | Ethics | 1 | 15 | 3.0K | 3.8K |
| 330 | social science | 1 | 15 | 239 | 591 |
| 330 | values | 1 | 15 | 345 | 224 |
| 333 | Petroleum Engineering | 1 | 14 | 649 | 919 |
| 333 | Rural Development | 1 | 14 | 418 | 612 |
| 333 | Petroleum Geology | 1 | 14 | 150 | 305 |
| 333 | Ethnic Conflict | 1 | 14 | 495 | 746 |
| 333 | Mass Spectrometry | 1 | 14 | 5.3K | 8.1K |
| 333 | forced migration | 1 | 14 | 495 | 746 |
| 333 | Libya | 1 | 14 | 56 | 54 |
| 333 | race relations | 1 | 14 | 1.3K | 1.8K |
| 333 | Metals | 1 | 14 | 4.2K | 4.3K |
| 342 | Architectural Design | 1 | 13 | 1.1K | 1.3K |
| 342 | local government | 1 | 13 | 563 | 1.0K |
| 342 | Optical materials | 1 | 13 | 13.0K | 20.6K |
| 342 | Teaching | 1 | 13 | 3.5K | 4.2K |
| 346 | Neurology | 1 | 12 | 62.7K | 65.0K |
| 346 | Environmentalism | 1 | 12 | 183 | 525 |
| 346 | Food | 1 | 12 | 15.8K | 25.0K |
| 346 | Peasants | 1 | 12 | 117 | 276 |
| 350 | Geriatrics | 1 | 11 | 17.8K | 27.5K |
| 350 | Computational Fluid Dynamics | 1 | 11 | 708 | 928 |
| 350 | Gerontology | 1 | 11 | 8.5K | 13.0K |
| 350 | Aging | 1 | 11 | 17.2K | 26.2K |
| 354 | Environmental hydraulics | 1 | 10 | 25 | 48 |
| 354 | Eastern Europe | 1 | 10 | 1.7K | 1.7K |
| 354 | particles | 1 | 10 | 1.7K | 3.0K |
| 354 | immigrants | 1 | 10 | 201 | 243 |
| 354 | DNA | 1 | 10 | 2.2K | 4.7K |
| 359 | Cytology | 1 | 9 | 44.3K | 64.7K |
| 359 | Cell Biology | 1 | 9 | 44.3K | 64.6K |
| 359 | Play | 2 | 9 | 23 | 75 |
| 359 | Japan | 2 | 9 | 5.2K | 10.5K |
| 359 | African diaspora | 1 | 9 | 22 | 42 |
| 364 | Biopharmaceutics | 1 | 8 | 4.6K | 9.0K |
| 364 | drugs | 1 | 8 | 9.1K | 17.2K |
| 366 | Transportation Engineering | 1 | 7 | 639 | 1.4K |
| 366 | Real Estate Development | 1 | 7 | 13 | 21 |
| 366 | Probability | 2 | 7 | 891 | 3.0K |
| 366 | Technology Assessment | 1 | 7 | 114 | 358 |
| 366 | Financial management | 2 | 7 | 534 | 2.6K |
| 366 | Risk | 2 | 7 | 741 | 3.2K |
| 366 | sustainable forestry | 1 | 7 | 116 | 330 |
| 366 | Cost effectiveness | 1 | 7 | 105 | 301 |
| 366 | Decision making | 1 | 7 | 4.5K | 9.0K |
| 375 | Ichnology | 1 | 6 | 83 | 209 |
| 375 | Trace fossils | 1 | 6 | 83 | 209 |
| 375 | Bioavailability | 1 | 6 | 173 | 514 |
| 375 | Qualitative Research | 1 | 6 | 903 | 1.8K |
| 375 | Russia | 1 | 6 | 302 | 322 |
| 375 | Communication | 1 | 6 | 3.3K | 6.6K |
| 375 | Mountains | 3 | 6 | 273 | 1.2K |
| 382 | Nanochemistry | 1 | 5 | 4.8K | 9.0K |
| 382 | Marine Meteorology | 2 | 5 | 340 | 878 |
| 382 | Flood forecasting | 1 | 5 | 161 | 651 |
| 382 | Flood control | 1 | 5 | 377 | 1.1K |
| 382 | Chemical structure | 1 | 5 | 1.2K | 2.0K |
| 382 | disaster relief | 2 | 5 | 93 | 936 |
| 388 | Civil Engineering | 2 | 4 | 2.6K | 6.2K |
| 388 | Intelligent Transportation Systems | 2 | 4 | 1.6K | 4.5K |
| 388 | Forest Ecology | 1 | 4 | 716 | 1.7K |
| 388 | Material Culture | 1 | 4 | 85 | 257 |
| 388 | Tourism | 1 | 4 | 1.6K | 3.6K |
| 388 | Viticulture | 1 | 4 | 178 | 521 |
| 388 | Malaria | 1 | 4 | 1.9K | 4.0K |
| 388 | Wine | 1 | 4 | 42 | 152 |
| 396 | Pharmacognosy | 1 | 3 | 7.9K | 17.5K |
| 396 | Environmental Education | 1 | 3 | 580 | 1.5K |
| 396 | Natural resources | 1 | 3 | 1.2K | 2.3K |
| 396 | Research Design | 1 | 3 | 3.6K | 9.1K |
| 396 | Medicinal plants | 1 | 3 | 5.2K | 12.0K |
| 396 | Urban Transportation | 1 | 3 | 251 | 715 |
| 396 | Liposomes | 1 | 3 | 1.2K | 3.0K |
| 396 | geological modeling | 1 | 3 | 1.0K | 2.3K |
| 396 | Lipid bilayers | 1 | 3 | 782 | 1.8K |
| 405 | Social History | 1 | 2 | 662 | 1.5K |
| 405 | behavioral medicine | 1 | 2 | 5.1K | 12.3K |
| 405 | Arboriculture | 1 | 2 | 83 | 181 |
| 405 | human behavior | 1 | 2 | 9.4K | 21.5K |
| 405 | Input-output analysis | 1 | 2 | 299 | 741 |
| 405 | Building | 1 | 2 | 1.3K | 2.8K |
| 405 | Middle Ages | 1 | 2 | 113 | 208 |
| 412 | Psychiatry | 1 | 1 | 30.1K | 56.2K |
| 412 | Genetic engineering | 1 | 1 | 13.6K | 30.9K |
| 412 | Community Psychiatry | 1 | 1 | 4.6K | 10.5K |
| 412 | Autobiography | 1 | 1 | 17 | 32 |
| 412 | Plate Tectonics | 1 | 1 | 305 | 676 |
| 412 | Child | 1 | 1 | 17.7K | 35.3K |
| 412 | Synchrotron Radiation | 1 | 1 | 616 | 1.6K |
| 412 | Child welfare | 1 | 1 | 2.4K | 5.9K |
| 412 | Child Development | 1 | 1 | 7.6K | 17.3K |
| 412 | Watershed management | 1 | 1 | 332 | 1.2K |
| 412 | Child psychology | 1 | 1 | 5.7K | 12.7K |
| 412 | Africa | 1 | 1 | 5.1K | 11.6K |
| 412 | chemical pollution | 1 | 1 | 3 | 45 |
| 412 | child behavior | 1 | 1 | 1.1K | 3.3K |
| 412 | Aquaculture | 1 | 1 | 2.2K | 5.1K |
| 412 | children | 1 | 1 | 669 | 1.9K |
| 428 | Physiology | 1 | 0 | 36.7K | 64.4K |
| 428 | Atmospheric Science | 2 | 0 | 91 | 399 |
| 428 | Food Science | 1 | 0 | 507 | 1.7K |
| 428 | Pathology | 1 | 0 | 22.0K | 46.3K |
| 428 | Chemical Ecology | 1 | 0 | 1.4K | 2.9K |
| 428 | Morphology | 1 | 0 | 2.2K | 5.2K |
| 428 | Educational Technology | 1 | 0 | 3.1K | 9.0K |
| 428 | Radiation Protection | 1 | 0 | 1.2K | 3.2K |
| 428 | Fire ecology | 1 | 0 | 58 | 272 |
| 428 | energy conservation | 1 | 0 | 4.2K | 10.8K |
| 428 | Arthropods | 1 | 0 | 383 | 1.5K |
| 428 | pheromones | 1 | 0 | 1.3K | 2.7K |
| 428 | social aspects | 3 | 0 | 30 | 520 |
| 428 | educational innovations | 1 | 0 | 775 | 2.2K |
| 428 | Plant cells | 1 | 0 | 6.1K | 13.2K |
| 428 | Toxins | 1 | 0 | 1.8K | 5.1K |
