Citation Rankings (Highly Cited Researchers) and the list of the most cited and influential researchers cover a wide range of scientific fields, spanning 197 main and sub-disciplines, as well as the Art and Humanities Citation Rankings and Social Sciences and Humanities Citation Rankings, offering a unique service. Additionally, the list without CERN, Statistical Data, etc., provided exclusively by “AD Scientific Index”, is part of our effort to balance the situation created by CERN and researchers with statistical data, who have an advantage over others, especially those in the social and humanities fields. There should be new regulations for multi-author and CERN papers. Citation lists also reveal many rule violations and unethical practices. See also for more specific citation analyses: Scientists Last 6 years Citation Index, Universities Total Citations Rankings 2025 and Universities Last 6 Years Citations Rankings 2025
* Total Citation Counts Rankings
Ranking Based On Selection :1
Nanoscience
Nanotechnology
Nanobiogeoscience
environmental science
ICTAS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,944
8,422
0.352
* Total Citation Counts Rankings
Ranking Based On Selection :2
microbiome
built environment
antibiotic resistance genes
water
ICTAS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,160
14,599
0.659
* Total Citation Counts Rankings
Ranking Based On Selection :3
environmental engineering
bioaerosols
infectious disease transmission
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,793
13,785
0.734
* Total Citation Counts Rankings
Ranking Based On Selection :4
slduge processing
biological wastewater treatment
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,234
4,234
0.297
* Total Citation Counts Rankings
Ranking Based On Selection :5
water quality and water supply
environmental engineering
environmental science
hydrology
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,270
2,196
0.350
* Total Citation Counts Rankings
Ranking Based On Selection :6
environmental science
analytical chemistry
environmental chemistry
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,918
2,092
0.425
* Total Citation Counts Rankings
Ranking Based On Selection :7
environmental and natural resource economics
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,603
810
0.311
* Total Citation Counts Rankings
Ranking Based On Selection :8
environmental engineering
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,517
1,093
0.434
* Total Citation Counts Rankings
Ranking Based On Selection :9
Climate change adaptation
multi-stakeholder decision-making
public participation
infrastructure planning
role-play simulatio
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,921
1,341
0.698
* Total Citation Counts Rankings
Ranking Based On Selection :10
Bioaerosol
Indoor Air Quality
Infectious Diseases
Particle Lung Deposition
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,355
1,309
0.966
* Total Citation Counts Rankings
Ranking Based On Selection :11
engineering education
international education
environmental studies
environmental humanities
ecocriticism
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
820
651
0.794
* Total Citation Counts Rankings
Ranking Based On Selection :12
indoor air quality
SVOCs
Life cycle assessment
contaminant transport
PFAS
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
732
379
0.518
Michael Hochella
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
23,944
8,422
0.352
Nanoscience
Nanotechnology
Nanobiogeoscience
environmental science
ICTAS
Amy Pruden
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
22,160
14,599
0.659
microbiome
built environment
antibiotic resistance genes
water
ICTAS
Linsey C Marr
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
18,793
13,785
0.734
environmental engineering
bioaerosols
infectious disease transmission
John Novak
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
14,234
4,234
0.297
slduge processing
biological wastewater treatment
Stanley Grant
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
6,270
2,196
0.350
water quality and water supply
environmental engineering
environmental science
hydrology
Kang Xia
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
4,918
2,092
0.425
environmental science
analytical chemistry
environmental chemistry
Kurt Stephenson
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,603
810
0.311
environmental and natural resource economics
Fei Zhang
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
2,517
1,093
0.434
environmental engineering
Todd Schenk
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,921
1,341
0.698
Climate change adaptation
multi-stakeholder decision-making
public participation
infrastructure planning
role-play simulatio
Kaisen Lin
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
1,355
1,309
0.966
Bioaerosol
Indoor Air Quality
Infectious Diseases
Particle Lung Deposition
Robert S Emmett
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
820
651
0.794
engineering education
international education
environmental studies
environmental humanities
ecocriticism
Jennifer Benning
Citation Metrics
Total
Last 6 Years
Last 6 Years / Total
732
379
0.518
indoor air quality
SVOCs
Life cycle assessment
contaminant transport
PFAS