NDA & NA Exam • Ecology & Environment Portal
NDA Ecology & Environment Hub
Select a chapter module to explore high-yield environmental notes, ecological pyramids, practice drills, and previous years’ UPSC questions.
Chapter 01 • Organisms & Populations
Biotic/Abiotic Factors, Adaptations & Population Growth Models
Chapter 02 • Ecosystem Dynamics
Food Chains, Webs, Ecological Pyramids & Nutrient Cycles
Chapter 03 • Biodiversity
Biodiversity Hotspots, Red Data Book, National Parks & Sanctuaries
Chapter 04 • Environmental Issues
Air/Water Pollution, Ozone Depletion, Biomagnification & Waste
Chapter 05 • Global Conventions
Greenhouse Effect, UNFCCC, Kyoto Protocol & Paris Agreement
Chapter 06 • Sustainable Energy