Q.1: How will you define environment?
Ans: The natural world around a living thing is called their environment.
Q.2: What is pollution?
Ans: A harmful change in the environment is called pollution.
Q.3: What are the types of pollution?
Ans: Land, Air, water and noise pollution are the types of pollution.
Q.4: How can we use non-biodegradable materials again?
Ans: We can use non-biodegradable materials again by recycling them.
Q.5: Make a list of non-biodegradable materials?
Ans: Plastic things, Empty cans, fused bulbs, broken parts of machines etc.
Q.1: What measures can we take to reduce water and land pollution?
Ans: Water Pollution: We should not throw rubbish and waste in water. We should keep away the waste and chemical mixed water from rivers and streams.
Air pollution: We should not burn rubbish in open air. We should use fuels in limited amount.
Q.2: How does pollution effect human beings?
Ans: Pollution brings hepatitis, Lung cancers, Nervous diseases, Asthma etc in Human being.
Q.3: How non-biodegradable materials pollute our environment?
Ans: Non-biodegradable materials block the flow of water. It also affects the natural beauty of land.
Q.4: How biodegradable things are different from non-biodegradable things?
Ans: Biodegradable things are those which can be degraded naturally by bacteria and fungi. Non-biodegradable things are those which cannot be degraded naturally.