Why do we fall ill (Bengali)
Natural Resources (Soil)
Improvement of Food Resources
Water Conservation and Management of Water Resources
Greenhouse Gases and Ozone Layer
Carbon Cycle
Nitrogen Cycle
Oxygen Cycle
Sustainable Agriculture
Animal Husbandry and Poultry Farming
Cattle farming
Variety of Revolution and Organic Farming
Courtesy:
School Education Department, Govt. of Tripura
and Tripura Shiksha Bandhu Youtube Channel
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