Top 100 Scientists

World Top 100 Scientists 2025

Top 100 scientists can be ranked globally or specific to the following regions including Africa, Asia, Europe, North America, Latin America, Oceania, Arab League, ASEAN, EECA, and BRICS based on total H-index scores without any breakdown by subject areas. Top 100 rankings in the world, in a continent, or a region include standardized subjects areas of Agriculture & Forestry, Arts, Design and Architecture, Business & Management, Economics & Econometrics, Education, Engineering & Technology, History, Philosophy, Theology, Law/Law and Legal Studies, Medical and Health Sciences, Natural Sciences, Social Sciences, Art and Humanities Rankings and Social Sciences and Humanities Rankings BETA VERSION. Subject field ranking in world, region, country and university is beta version since subject field "others" (873,864 scientists profile whose branch cannot be determined, not yet edited or determined) is excluded, so the ranking will change as the others fields are edited. Please note that. Subjects indicated as “ * others ” will not be included in the ranking by regions and subjects.

* Rankings
Ranking Based On Selection :1
Megharaj Mallavarapu|Mallavarapu Megharaj
Bioremediation
Ecotoxicology
Environmental Science
Environmental Microbiology
Mixed Contaminants
Metrics
H-Index
i10 Index
Citation
100
481
39,032
Yanju Liu
Environmental Soil Chemistry
waste utilisation
sorption remediation
Metrics
H-Index
i10 Index
Citation
38
69
5,665
* Rankings
Ranking Based On Selection :10
In Young Yeo
Catchment hydrology
GIS and Remote Sensing
Environmental Planning
Spatial Analysis
Spatial Optimization
Metrics
H-Index
i10 Index
Citation
26
50
2,129
* Rankings
Ranking Based On Selection :11
Rajarathnam D
Analytical Chemistry
Environmental Analysis
Materials Characterization
Metrics
H-Index
i10 Index
Citation
25
47
3,769
* Rankings
Ranking Based On Selection :12
Kannan Krishnan
Environmental Science
Biomedical
Protein Biophysics
Laser Confocal Microscopy
Metrics
H-Index
i10 Index
Citation
20
32
1,365
* Rankings
Ranking Based On Selection :14
Liam Phelan
sustainability
political economy
climate change
complex adaptive systems
teaching and learning
Metrics
H-Index
i10 Index
Citation
18
23
1,180
* Rankings
Ranking Based On Selection :15
SM Zobaidul Kabir
Environmental impact assessment
renewable energy
climate change
sustainable development
Metrics
H-Index
i10 Index
Citation
17
27
1,131
* Rankings
Ranking Based On Selection :16
Craig Evans
Water quality
environmental monitoring
aquatic ecology
environmental microbiology
Metrics
H-Index
i10 Index
Citation
17
22
2,060
* Rankings
Ranking Based On Selection :17
Phillip M Geary
Small wastewater systems
pollution source tracking
contaminated soil and groundwater
constructed wetlands
Metrics
H-Index
i10 Index
Citation
17
26
1,202
* Rankings
Ranking Based On Selection :21
Charles CC Lee
environmental remediation
sustainability
ecological rehabilitation
hyperaccummulator plants
Metrics
H-Index
i10 Index
Citation
11
11
612
Xianfeng Liu
Unsaturated soil mechanics
rock mechanics
Geoenvironmental engineering
Metrics
H-Index
i10 Index
Citation
1
1
11
Rankings
Ranking Based On Selection: 1
Megharaj Mallavarapu|Mallavarapu Megharaj
Metrics
H-Index
i10 Index
Citation Counts
100
481
39,032
Bioremediation
Ecotoxicology
Environmental Science
Environmental Microbiology
Mixed Contaminants
Rankings
Ranking Based On Selection: 2
Mohammad Mahmudur Rahman
Metrics
H-Index
i10 Index
Citation Counts
64
177
16,257
Rankings
Ranking Based On Selection: 3
Garry Willgoose
Metrics
H-Index
i10 Index
Citation Counts
52
110
9,658
Rankings
Ranking Based On Selection: 4
Jetse Kalma
Metrics
H-Index
i10 Index
Citation Counts
45
108
8,333
Rankings
Ranking Based On Selection: 5
Yanju Liu
Metrics
H-Index
i10 Index
Citation Counts
38
69
5,665
Environmental Soil Chemistry
waste utilisation
sorption remediation
Rankings
Ranking Based On Selection: 6
Patricia M Saco
Metrics
H-Index
i10 Index
Citation Counts
33
56
3,635
Rankings
Ranking Based On Selection: 7
Geoff R MacFarlane
Metrics
H-Index
i10 Index
Citation Counts
32
61
4,888
Rankings
Ranking Based On Selection: 8
Richard Yu
Metrics
H-Index
i10 Index
Citation Counts
28
48
2,980
Rankings
Ranking Based On Selection: 9
Xanne AK Janse de Jonge
Metrics
H-Index
i10 Index
Citation Counts
27
36
4,976
Rankings
Ranking Based On Selection: 10
In Young Yeo
Metrics
H-Index
i10 Index
Citation Counts
26
50
2,129
Catchment hydrology
GIS and Remote Sensing
Environmental Planning
Spatial Analysis
Spatial Optimization
Rankings
Ranking Based On Selection: 11
Rajarathnam D
Metrics
H-Index
i10 Index
Citation Counts
25
47
3,769
Analytical Chemistry
Environmental Analysis
Materials Characterization
Rankings
Ranking Based On Selection: 12
Kannan Krishnan
Metrics
H-Index
i10 Index
Citation Counts
20
32
1,365
Environmental Science
Biomedical
Protein Biophysics
Laser Confocal Microscopy
Rankings
Ranking Based On Selection: 13
Abinandan Sudharsanam
Metrics
H-Index
i10 Index
Citation Counts
19
30
1,583
Rankings
Ranking Based On Selection: 14
Liam Phelan
Metrics
H-Index
i10 Index
Citation Counts
18
23
1,180
sustainability
political economy
climate change
complex adaptive systems
teaching and learning
Rankings
Ranking Based On Selection: 15
SM Zobaidul Kabir
Metrics
H-Index
i10 Index
Citation Counts
17
27
1,131
Environmental impact assessment
renewable energy
climate change
sustainable development
Rankings
Ranking Based On Selection: 16
Craig Evans
Metrics
H-Index
i10 Index
Citation Counts
17
22
2,060
Water quality
environmental monitoring
aquatic ecology
environmental microbiology
Rankings
Ranking Based On Selection: 17
Phillip M Geary
Metrics
H-Index
i10 Index
Citation Counts
17
26
1,202
Small wastewater systems
pollution source tracking
contaminated soil and groundwater
constructed wetlands
Rankings
Ranking Based On Selection: 18
Peter Sanderson
Metrics
H-Index
i10 Index
Citation Counts
16
18
1,082
Rankings
Ranking Based On Selection: 19
Ying CHENG
Metrics
H-Index
i10 Index
Citation Counts
14
16
776
Rankings
Ranking Based On Selection: 20
Josephine Vaughan
Metrics
H-Index
i10 Index
Citation Counts
13
22
596
Rankings
Ranking Based On Selection: 21
Charles CC Lee
Metrics
H-Index
i10 Index
Citation Counts
11
11
612
environmental remediation
sustainability
ecological rehabilitation
hyperaccummulator plants
Rankings
Ranking Based On Selection: 22
Zephan Chan Yu Yun
Metrics
H-Index
i10 Index
Citation Counts
4
4
1,768
Rankings
Ranking Based On Selection: 23
Xianfeng Liu
Metrics
H-Index
i10 Index
Citation Counts
1
1
11
Unsaturated soil mechanics
rock mechanics
Geoenvironmental engineering