- Ecology
- Ecosystem and its dynamics
- Biogeochemical Cycles
- Biomes: Forest, Grassland, Mountain, and Desert Ecosystems
- Aquatic Life Zones: Ocean, Rivers, Lakes, and Wetlands
- Biodiversity Basics
- Effect of Human Activities on Environment
- Biodiversity Conservation
- Water Resource degradation
- Minerals & Environmental Degradation
- Deforestation
- Waste Management
- Sustainable Development
- Environmental Pollution
- Solid Waste Management
- Coastal Ecosystem Management
- Recent developments
- Environmental Impact Assessment
- Environmental Laws
- Environment related Institutions and Organizations
- Schemes
- International Environmental Governance
- Basics of Climate change
- Urbanization and climate
- Impact of agriculture on climate
- Global Warming & Health