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
Chuyang Tang
Environmental engineering
Membrane technology
Desalination
Water reuse
Metrics
H-Index
i10 Index
Citation
117
344
44,876
* Rankings
Ranking Based On Selection :2
Tong Zhang Hku
Environmental Biotechnology
Environmental Microbiology
Environmental Microbiome
Biological Wastewater Treatment
Metrics
H-Index
i10 Index
Citation
115
315
43,886
* Rankings
Ranking Based On Selection :5
Xiaoling Zhang
Urban Sustainability
Sustainable built environment
Carbon neutrality
Sustainability Science
Metrics
H-Index
i10 Index
Citation
89
254
24,277
* Rankings
Ranking Based On Selection :6
Xiao Yan Li Xy Li
Water quality and water supply
Wastewater treatment
Particle dynamics in water
Metrics
H-Index
i10 Index
Citation
76
244
24,154
* Rankings
Ranking Based On Selection :7
Linwei Tian
Environmental epidemiology
air pollution and health
chemical carcinogenesis
Metrics
H-Index
i10 Index
Citation
65
165
12,834
* Rankings
Ranking Based On Selection :9
Jiu Jimmy Jiao 焦赳赳
Hydrogeology
Groundwater
Coastal Hydrogeology
Engineering Geology
HKU-DES
Metrics
H-Index
i10 Index
Citation
56
159
9,003
* Rankings
Ranking Based On Selection :10
Yiu Fai Tsang
Wastewater Treatment
Microplastics and Nanoplastics
Resource Recovery
Environmental Engineering
Environmental Technology
Metrics
H-Index
i10 Index
Citation
54
180
13,581
* Rankings
Ranking Based On Selection :15
Season Si Chen
Environmental Engineering
Chemical Engineering
Biomass Conversion
Waste Valorization
Metrics
H-Index
i10 Index
Citation
37
54
6,616
* Rankings
Ranking Based On Selection :16
Cui Guo (郭萃)|Guo, C, C GUO
Environmental Health
Life course/lifespan
Healthy cities
Chronic diseases
Cohort studies
Metrics
H-Index
i10 Index
Citation
35
53
4,241
* Rankings
Ranking Based On Selection :17
Peter Hills
energy policy
sustainable development
environmental policy
environmental management
Metrics
H-Index
i10 Index
Citation
35
70
4,428
* Rankings
Ranking Based On Selection :21
Wai Chin Li
Environmental Pollution
heavy metal
rice
phytoremediation
Metrics
H-Index
i10 Index
Citation
32
59
6,489
* Rankings
Ranking Based On Selection :22
Yuan Shi
Environmental Planning
GIS
Air Pollution
Land Use Regression
Sustainable and Resilient Cities
Metrics
H-Index
i10 Index
Citation
31
53
2,965
* Rankings
Ranking Based On Selection :23
Zhang Sheng
non-uniform air distribution
(adaptive) thermal comfort
indoor air quality
low/zero energy buildings
ejector cooling
Metrics
H-Index
i10 Index
Citation
29
47
2,090
* Rankings
Ranking Based On Selection :25
Lincoln Fok
Environmental pollution
Hydrology
Environmental education
Metrics
H-Index
i10 Index
Citation
29
38
5,731
* Rankings
Ranking Based On Selection :27
Ling Luo
Environmental Chemistry
Environmental Microbiology and Toxicology
Metrics
H-Index
i10 Index
Citation
27
57
3,002
* Rankings
Ranking Based On Selection :28
Ran Yin
Ultraviolet (UV)
Chlorine chemistry
Water reuse engineering
Environment-health nexus
Metrics
H-Index
i10 Index
Citation
27
50
2,370
* Rankings
Ranking Based On Selection :29
Basanta Kumar Biswal
Environmental Biotechnology
Nature-based Solutions
Antimicrobial resistance
Denitrification
LIBs
Metrics
H-Index
i10 Index
Citation
26
40
2,126
* Rankings
Ranking Based On Selection :32
Alok D Bokare
Environmental Remediation
Water Treatment Technology
Advanced Oxidation Processes
Photo-Redox Catalysis
Metrics
H-Index
i10 Index
Citation
23
26
5,403
* Rankings
Ranking Based On Selection :33
Muhammad Usman Farid
Water desalination and treatment
Membrane technology
Nanocomposite membranes
Metrics
H-Index
i10 Index
Citation
21
24
1,771
* Rankings
Ranking Based On Selection :34
Xingcheng Lu
Air Quality
3D Numerical Modeling
Remote Sensing
Machine Learning
Environmental Science
Metrics
H-Index
i10 Index
Citation
21
30
1,560
* Rankings
Ranking Based On Selection :35
Ji Dai
Wastewater treatment
urine separation and treatment
life cycle assessment
Metrics
H-Index
i10 Index
Citation
20
30
1,097
* Rankings
Ranking Based On Selection :37
Benoit Thibodeau
Climate Change
Oceanography
biogeochemistry
stable isotopes
paleoceanography
Metrics
H-Index
i10 Index
Citation
19
23
969
* Rankings
Ranking Based On Selection :38
Xiaoguang Ouyang
Climate Change
Ecology
Mangroves
Carbon cycling
Multi-criterion decision making
Metrics
H-Index
i10 Index
Citation
18
21
1,683
* Rankings
Ranking Based On Selection :39
Wenwei Che
Air pollution
exposure modeling
microenvironment air quality characterization
vehicle emission
Metrics
H-Index
i10 Index
Citation
17
21
1,827
* Rankings
Ranking Based On Selection :41
Xiaofan Zhao
climate change
environmental governance
policy implementation
energy efficiency
regulatory compliance
Metrics
H-Index
i10 Index
Citation
16
20
1,152
* Rankings
Ranking Based On Selection :43
Ying Mei 梅颖
Environmental engineering
Reverse electrodialysis
membrane technology
desalination
Metrics
H-Index
i10 Index
Citation
15
21
1,419
* Rankings
Ranking Based On Selection :44
Michelle KM Wong
Environmental Policy
Stakeholders Engagement
Environmental Communications
Ecology & Microbiology
Metrics
H-Index
i10 Index
Citation
15
20
1,235
Huaxin Lei
Enviromental microbiology
Virome
Built environments
Biodegradation
Metrics
H-Index
i10 Index
Citation
6
6
147
Long Jiang
environmental engineering
water quality modelling
ecohydrology
Metrics
H-Index
i10 Index
Citation
5
3
151
Wenyu Liu
environmental sciences & ecology
membrane science and technology
water and wastewater treatment
Metrics
H-Index
i10 Index
Citation
4
4
69
Stefano Mingolla
environmental science
environmental economics
net-zero agriculture
energy system modeling
Metrics
H-Index
i10 Index
Citation
3
1
54
Rankings
Ranking Based On Selection: 1
Chuyang Tang
Metrics
H-Index
i10 Index
Citation Counts
117
344
44,876
Environmental engineering
Membrane technology
Desalination
Water reuse
Rankings
Ranking Based On Selection: 2
Tong Zhang Hku
Metrics
H-Index
i10 Index
Citation Counts
115
315
43,886
Environmental Biotechnology
Environmental Microbiology
Environmental Microbiome
Biological Wastewater Treatment
Rankings
Ranking Based On Selection: 4
Wen Xiong Wang
Metrics
H-Index
i10 Index
Citation Counts
92
488
31,291
Rankings
Ranking Based On Selection: 5
Xiaoling Zhang
Metrics
H-Index
i10 Index
Citation Counts
89
254
24,277
Urban Sustainability
Sustainable built environment
Carbon neutrality
Sustainability Science
Rankings
Ranking Based On Selection: 6
Xiao Yan Li Xy Li
Metrics
H-Index
i10 Index
Citation Counts
76
244
24,154
Water quality and water supply
Wastewater treatment
Particle dynamics in water
Rankings
Ranking Based On Selection: 7
Linwei Tian
Metrics
H-Index
i10 Index
Citation Counts
65
165
12,834
Environmental epidemiology
air pollution and health
chemical carcinogenesis
Rankings
Ranking Based On Selection: 8
GH Chen
Metrics
H-Index
i10 Index
Citation Counts
64
238
14,285
Rankings
Ranking Based On Selection: 9
Jiu Jimmy Jiao 焦赳赳
Metrics
H-Index
i10 Index
Citation Counts
56
159
9,003
Hydrogeology
Groundwater
Coastal Hydrogeology
Engineering Geology
HKU-DES
Rankings
Ranking Based On Selection: 10
Yiu Fai Tsang
Metrics
H-Index
i10 Index
Citation Counts
54
180
13,581
Wastewater Treatment
Microplastics and Nanoplastics
Resource Recovery
Environmental Engineering
Environmental Technology
Rankings
Ranking Based On Selection: 11
Zhi Ning
Metrics
H-Index
i10 Index
Citation Counts
52
106
10,061
Rankings
Ranking Based On Selection: 12
Alicia Kyoungjin An
Metrics
H-Index
i10 Index
Citation Counts
47
108
7,764
Rankings
Ranking Based On Selection: 13
Hong Qiu
Metrics
H-Index
i10 Index
Citation Counts
46
82
4,880
Rankings
Ranking Based On Selection: 14
Lai Alvin
Metrics
H-Index
i10 Index
Citation Counts
45
98
7,437
Rankings
Ranking Based On Selection: 15
Season Si Chen
Metrics
H-Index
i10 Index
Citation Counts
37
54
6,616
Environmental Engineering
Chemical Engineering
Biomass Conversion
Waste Valorization
Rankings
Ranking Based On Selection: 16
Cui Guo (郭萃)|Guo, C, C GUO
Metrics
H-Index
i10 Index
Citation Counts
35
53
4,241
Environmental Health
Life course/lifespan
Healthy cities
Chronic diseases
Cohort studies
Rankings
Ranking Based On Selection: 17
Peter Hills
Metrics
H-Index
i10 Index
Citation Counts
35
70
4,428
energy policy
sustainable development
environmental policy
environmental management
Rankings
Ranking Based On Selection: 18
Xun Wu
Metrics
H-Index
i10 Index
Citation Counts
34
64
5,038
water governance
health policy
anti-corruption
China
Policy Design
Rankings
Ranking Based On Selection: 19
Eun Soon Im
Metrics
H-Index
i10 Index
Citation Counts
34
54
3,252
climate change
regional climate modeling
climate change impact
Rankings
Ranking Based On Selection: 20
Hao Guo 郭浩|Hao Guo, Guo Hao
Metrics
H-Index
i10 Index
Citation Counts
33
50
5,128
Rankings
Ranking Based On Selection: 21
Wai Chin Li
Metrics
H-Index
i10 Index
Citation Counts
32
59
6,489
Rankings
Ranking Based On Selection: 22
Yuan Shi
Metrics
H-Index
i10 Index
Citation Counts
31
53
2,965
Environmental Planning
GIS
Air Pollution
Land Use Regression
Sustainable and Resilient Cities
Rankings
Ranking Based On Selection: 23
Zhang Sheng
Metrics
H-Index
i10 Index
Citation Counts
29
47
2,090
non-uniform air distribution
(adaptive) thermal comfort
indoor air quality
low/zero energy buildings
ejector cooling
Rankings
Ranking Based On Selection: 24
Yuefei Ruan
Metrics
H-Index
i10 Index
Citation Counts
29
51
2,213
Rankings
Ranking Based On Selection: 25
Lincoln Fok
Metrics
H-Index
i10 Index
Citation Counts
29
38
5,731
Rankings
Ranking Based On Selection: 26
Xin Cheng|程鑫
Metrics
H-Index
i10 Index
Citation Counts
28
38
3,685
Rankings
Ranking Based On Selection: 27
Ling Luo
Metrics
H-Index
i10 Index
Citation Counts
27
57
3,002
Environmental Chemistry
Environmental Microbiology and Toxicology
Rankings
Ranking Based On Selection: 28
Ran Yin
Metrics
H-Index
i10 Index
Citation Counts
27
50
2,370
Ultraviolet (UV)
Chlorine chemistry
Water reuse engineering
Environment-health nexus
Rankings
Ranking Based On Selection: 29
Basanta Kumar Biswal
Metrics
H-Index
i10 Index
Citation Counts
26
40
2,126
Environmental Biotechnology
Nature-based Solutions
Antimicrobial resistance
Denitrification
LIBs
Rankings
Ranking Based On Selection: 30
Benoît Mayer
Metrics
H-Index
i10 Index
Citation Counts
26
54
2,261
Rankings
Ranking Based On Selection: 31
Guojun He
Metrics
H-Index
i10 Index
Citation Counts
25
27
5,383
Environmental and Energy Economics
Development Economics
Chinese Economy
Rankings
Ranking Based On Selection: 32
Alok D Bokare
Metrics
H-Index
i10 Index
Citation Counts
23
26
5,403
Environmental Remediation
Water Treatment Technology
Advanced Oxidation Processes
Photo-Redox Catalysis
Rankings
Ranking Based On Selection: 33
Muhammad Usman Farid
Metrics
H-Index
i10 Index
Citation Counts
21
24
1,771
Water desalination and treatment
Membrane technology
Nanocomposite membranes
Rankings
Ranking Based On Selection: 34
Xingcheng Lu
Metrics
H-Index
i10 Index
Citation Counts
21
30
1,560
Air Quality
3D Numerical Modeling
Remote Sensing
Machine Learning
Environmental Science
Rankings
Ranking Based On Selection: 35
Ji Dai
Metrics
H-Index
i10 Index
Citation Counts
20
30
1,097
Wastewater treatment
urine separation and treatment
life cycle assessment
Rankings
Ranking Based On Selection: 36
Muyan Wu
Metrics
H-Index
i10 Index
Citation Counts
19
20
1,286
Rankings
Ranking Based On Selection: 37
Benoit Thibodeau
Metrics
H-Index
i10 Index
Citation Counts
19
23
969
Climate Change
Oceanography
biogeochemistry
stable isotopes
paleoceanography
Rankings
Ranking Based On Selection: 38
Xiaoguang Ouyang
Metrics
H-Index
i10 Index
Citation Counts
18
21
1,683
Climate Change
Ecology
Mangroves
Carbon cycling
Multi-criterion decision making
Rankings
Ranking Based On Selection: 39
Wenwei Che
Metrics
H-Index
i10 Index
Citation Counts
17
21
1,827
Air pollution
exposure modeling
microenvironment air quality characterization
vehicle emission
Rankings
Ranking Based On Selection: 40
Wanxin Li 李万新
Metrics
H-Index
i10 Index
Citation Counts
17
22
1,040
Rankings
Ranking Based On Selection: 41
Xiaofan Zhao
Metrics
H-Index
i10 Index
Citation Counts
16
20
1,152
climate change
environmental governance
policy implementation
energy efficiency
regulatory compliance
Rankings
Ranking Based On Selection: 42
Ronald D Hill
Metrics
H-Index
i10 Index
Citation Counts
16
28
1,245
Rankings
Ranking Based On Selection: 43
Ying Mei 梅颖
Metrics
H-Index
i10 Index
Citation Counts
15
21
1,419
Environmental engineering
Reverse electrodialysis
membrane technology
desalination
Rankings
Ranking Based On Selection: 44
Michelle KM Wong
Metrics
H-Index
i10 Index
Citation Counts
15
20
1,235
Environmental Policy
Stakeholders Engagement
Environmental Communications
Ecology & Microbiology
Rankings
Ranking Based On Selection: 45
Huihui Zhang
Metrics
H-Index
i10 Index
Citation Counts
14
18
599
Rankings
Ranking Based On Selection: 46
Jingyi Jiang
Metrics
H-Index
i10 Index
Citation Counts
14
16
1,469
water treatment
disinfection byproducts
micropollutants
adsorption
Rankings
Ranking Based On Selection: 47
Haibo Li
Metrics
H-Index
i10 Index
Citation Counts
14
15
1,158
Rankings
Ranking Based On Selection: 48
Ruo Hong Li
Metrics
H-Index
i10 Index
Citation Counts
13
17
910
Rankings
Ranking Based On Selection: 49
Tesfaldet Gebreegziabher
Metrics
H-Index
i10 Index
Citation Counts
13
14
795
Waste to energy
Modeling
simulation and optimization
Heat Integration
Pinch Analysis
Rankings
Ranking Based On Selection: 50
Jason Lim Coo
Metrics
H-Index
i10 Index
Citation Counts
12
13
857
Rankings
Ranking Based On Selection: 51
Yinyi Lin
Metrics
H-Index
i10 Index
Citation Counts
12
13
503
Rankings
Ranking Based On Selection: 52
Fengyuan Chen
Metrics
H-Index
i10 Index
Citation Counts
11
11
484
Rankings
Ranking Based On Selection: 53
Meng Xu
Metrics
H-Index
i10 Index
Citation Counts
8
8
1,195
Rankings
Ranking Based On Selection: 54
Hemraj Bhattarai
Metrics
H-Index
i10 Index
Citation Counts
8
8
431
Air pollution
Atmospheric chemistry
Wildfires
Climate change
Rankings
Ranking Based On Selection: 55
Huaxin Lei
Metrics
H-Index
i10 Index
Citation Counts
6
6
147
Enviromental microbiology
Virome
Built environments
Biodegradation
Rankings
Ranking Based On Selection: 56
Jiadong Peng
Metrics
H-Index
i10 Index
Citation Counts
5
4
165
Rankings
Ranking Based On Selection: 57
Long Jiang
Metrics
H-Index
i10 Index
Citation Counts
5
3
151
environmental engineering
water quality modelling
ecohydrology
Rankings
Ranking Based On Selection: 58
Pei Zhang
Metrics
H-Index
i10 Index
Citation Counts
4
4
107
Rankings
Ranking Based On Selection: 59
Wenyu Liu
Metrics
H-Index
i10 Index
Citation Counts
4
4
69
environmental sciences & ecology
membrane science and technology
water and wastewater treatment
Rankings
Ranking Based On Selection: 60
Ifeanyichukwu C Nduka
Metrics
H-Index
i10 Index
Citation Counts
3
3
101
Climatology
Climate modelling
Machine learning
Environmental Science
Rankings
Ranking Based On Selection: 61
Stefano Mingolla
Metrics
H-Index
i10 Index
Citation Counts
3
1
54
environmental science
environmental economics
net-zero agriculture
energy system modeling
Rankings
Ranking Based On Selection: 62
Yu-De Pei
Metrics
H-Index
i10 Index
Citation Counts
2
1
20
Rankings
Ranking Based On Selection: 63
Zhonghao He
Metrics
H-Index
i10 Index
Citation Counts
2
0
11
Rankings
Ranking Based On Selection: 64
Ho Yin Ching
Metrics
H-Index
i10 Index
Citation Counts
1
1
1,126
Waste management
Sludge treatment and Environmental Impact Assessment