Earth & Environmental Sciences
river
100%
crater lake
93%
litter
88%
plastic
88%
pollution
77%
coastal water
56%
energy crop
50%
tire
50%
nutrient
50%
world
46%
macroinvertebrate
44%
eutrophication
42%
aquatic system
32%
Europe
30%
sea
30%
nutrient cycle
29%
algal community
29%
acid water
28%
phosphorus
27%
education
26%
water
26%
literature review
26%
acidity
25%
seafood
25%
river basin
25%
effect
25%
nitrogen
24%
land
24%
infill
24%
metal
23%
urbanization
22%
developing world
22%
modeling
22%
human activity
22%
hydrological cycle
22%
carbon cycle
21%
hydrology
21%
community composition
20%
leakage
20%
policy
20%
waste management
20%
fertilizer
19%
ship
19%
coastal area
19%
lake
18%
aquatic ecosystem
18%
microbial community
18%
toxicity
18%
water quality
18%
learning
18%
Engineering & Materials Science
Microplastic
75%
Rivers
65%
Education
54%
Crops
54%
Biodiesel
46%
Nutrients
44%
Tires
43%
Ecotoxicology
41%
Water
37%
Eutrophication
37%
Phosphorus
28%
Climate change
27%
Textbooks
27%
Solid wastes
27%
Waste management
27%
Natural resources
26%
Lakes
25%
Fertilizers
25%
Nitrogen
25%
Pollution
24%
Students
24%
Wastewater
23%
Developing countries
23%
Health
20%
Aquatic ecosystems
19%
Plastics
18%
Sewage
18%
Ships
18%
Snow
17%
Football
16%
Wear of materials
16%
Irrigation
15%
Cleaning
15%
Teaching
14%
Soils
13%
Ecosystems
12%
Cosmetics
12%
Plastic bottles
11%
Public utilities
10%
Beaches
9%
Watersheds
9%
Textiles
8%
Economics
8%
Complex networks
7%
Metals
7%
Environmental impact
7%
Water resources
7%
Smartphones
6%
Laundries
6%
Toxicity
6%
Social Sciences
water
67%
river
37%
wear and tear
35%
marine pollution
34%
Surface waters
33%
waste management
29%
Water quality
28%
scenario
26%
pollutant
25%
water management
25%
food safety
24%
learning success
24%
governance
22%
urbanization
20%
experience
20%
determinants
20%
environmental behavior
19%
Indonesia
19%
developing country
16%
student
16%
emotion
16%
learning
15%
sewage
13%
Drainage basins
13%
boredom
11%
trend
10%
performance
10%
lack
9%
water pollution
9%
questionnaire
9%
public utilities
9%
energy
9%
education
9%
interaction
9%
River transport
8%
cause
8%
health risk
7%
budget
7%
environmental impact
6%
health
6%
economic growth
6%
road
6%
public service
6%
world economy
6%
sustainable development
6%
Coastal environments
6%
action plan
5%
environmental education
5%
low income
5%
Healthcare
5%