Class 4 Subject --S.St. Chapter - 6 Waste Management Tick the correct option: 1. Animals and plants waste can be converted into ---- (a) Biogas 2. It is the duty of _____ to keep our surroundings clean and green. (b ) Both 3. It is easy to recycle ------ (a) Plastic 4. Construction waste can be used for ----- (a) Filling ditches B. Fill in the blanks : Human waste is open fields must be converted with soil in rural areas. Recycling is beneficial for the environment. Biodegradable ...