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
Reza Azin
Environmental science
Reservoir Engineeirng
Gas condensate
PVT
Metrics
H-Index
i10 Index
Citation
27
71
2,945
* Rankings
Ranking Based On Selection :2
Jamal Elfaki
Environmental Soil Chemistry
Soil Pollution
Soil Remediation
Smart Farming
Sustainable Agricultu
Metrics
H-Index
i10 Index
Citation
12
14
733
Ashley Danley-Thomson
Environmental Engineering
Water and Sanitation in Developing Countries
International Development Policy
Metrics
H-Index
i10 Index
Citation
6
5
156
Esmaeil Allahkarami
Environmental engineering
Chemical and Petroleum engineering
Wastewater Treatment
Metrics
H-Index
i10 Index
Citation
5
2
116
* Rankings
Ranking Based On Selection :7
Sabah Aljenaid
GIS
Remote Sensing
Coastal Vulnerability and Adaption
Climate Change
Metrics
H-Index
i10 Index
Citation
4
3
71
* Rankings
Ranking Based On Selection :8
Sumaya Yusuf Hasan Abbas
Sustainability
Waste Management
Waste to Energy
Feasibility studies
socio-economic studies
Metrics
H-Index
i10 Index
Citation
4
3
57
Brenda L Thomas
environmental science
sustainability education
student engagement
tranformative learning
co-creation of learning
Metrics
H-Index
i10 Index
Citation
3
1
45
Rankings
Ranking Based On Selection: 1
Reza Azin
Metrics
H-Index
i10 Index
Citation Counts
27
71
2,945
Environmental science
Reservoir Engineeirng
Gas condensate
PVT
Rankings
Ranking Based On Selection: 2
Jamal Elfaki
Metrics
H-Index
i10 Index
Citation Counts
12
14
733
Environmental Soil Chemistry
Soil Pollution
Soil Remediation
Smart Farming
Sustainable Agricultu
Rankings
Ranking Based On Selection: 3
Eric Otto
Metrics
H-Index
i10 Index
Citation Counts
8
6
281
Rankings
Ranking Based On Selection: 4
Natalie Harvey
Metrics
H-Index
i10 Index
Citation Counts
6
3
87
Rankings
Ranking Based On Selection: 5
Ashley Danley-Thomson
Metrics
H-Index
i10 Index
Citation Counts
6
5
156
Environmental Engineering
Water and Sanitation in Developing Countries
International Development Policy
Rankings
Ranking Based On Selection: 6
Esmaeil Allahkarami
Metrics
H-Index
i10 Index
Citation Counts
5
2
116
Environmental engineering
Chemical and Petroleum engineering
Wastewater Treatment
Rankings
Ranking Based On Selection: 7
Sabah Aljenaid
Metrics
H-Index
i10 Index
Citation Counts
4
3
71
GIS
Remote Sensing
Coastal Vulnerability and Adaption
Climate Change
Rankings
Ranking Based On Selection: 8
Sumaya Yusuf Hasan Abbas
Metrics
H-Index
i10 Index
Citation Counts
4
3
57
Sustainability
Waste Management
Waste to Energy
Feasibility studies
socio-economic studies
Rankings
Ranking Based On Selection: 9
Brenda L Thomas
Metrics
H-Index
i10 Index
Citation Counts
3
1
45
environmental science
sustainability education
student engagement
tranformative learning
co-creation of learning