Keyphrases
Acidic River
31%
Aquatic Systems
19%
Biodiesel
20%
Biodiesel Production
20%
Climate Change
29%
Coastal Eutrophication
27%
Coastal Ocean
23%
Coastal Waters
32%
Crater Lake
40%
Developing Countries
31%
East Java Indonesia
22%
Energy Crops
25%
Europe
37%
Extremely Acidic
37%
High Concentration
16%
Human Activities
15%
Hydrology
16%
Ijen Crater
17%
Indonesia
100%
Kali
20%
Kawah Ijen
40%
Low pH
25%
Macroinvertebrates
31%
Marine Litter
56%
Marine Litter Pollution
21%
Massive Open Online Courses
69%
Metal Concentration
21%
Meuse River
17%
Microplastic Emissions
15%
Microplastic Sources
18%
Microplastics
53%
MOOC
25%
N2O Emission
25%
Nutrient Export
40%
Nutrient Retention
18%
Peer Feedback
25%
Plastic Pollution
40%
Pollution
18%
River Basin
19%
River Water
16%
Riverbank
22%
Seafood
25%
Sengon
16%
Skills Lab
25%
Solid Waste Management
16%
Student Perceptions
25%
Tire
25%
Volcanic Lakes
18%
Volcanic Origin
25%
Waste Management Service
16%