B. Fill in the blanks
1. Living and non-living around us makes our environment
2. The burning of leaves causes air pollution.
3. Paper is biodegradable waste.
4. You use a plastic bottle to bring water to school every day you are using reuse in 3R’s.
True or False Statements:
1.Waste materials that decompose easily are called biodegradable waste.
Answer: True
2.Both living and non-living things make our environment.
Answer: True
3.In villages, people dispose of their household waste in landfills.
Answer: False
4.Burning is the best way of disposing waste.
Answer: False
5.To save the environment, we need to encourage carpooling.
Answer: True
Match the Following:
| Column A | Column B |
| 1. Biodegradable | a. Helps to decompose the waste |
| 2. 3R’s | b. Decomposition does not take place quickly |
| 3. Non-biodegradable | c. Decomposition takes place quickly |
| 4. Bacteria | d. Reduce, Reuse and Recycle |
Correct Matching: 1 → c 2 → d 3 → b 4 → a
Detailed Answers:
1. How can we make our environment clean and a better place to live in?
We can make our environment clean and better by taking simple but important steps:
•Avoid using plastic and polythene bags; use cloth bags instead.
•Plant more trees and take care of them.
•Do not throw waste on streets and open areas.
•Dispose of waste properly using three-colour bins.
•Avoid polluting water bodies and prevent water stagnation.
•Reduce noise and air pollution by avoiding crackers and using bicycles or walking.
•Use carpooling and public transport.
2. What are landfills? How can they be used?
Landfills are deep ditches where waste is dumped. When full, they are covered with soil. These are located on the outskirts of cities. Although commonly used, landfills are not completely safe for the environment as they may cause pollution and are not eco-friendly.
3. What do you understand by the term environment?
The environment is the natural world around us which includes both living and non-living things. Living beings such as humans, animals, and plants interact with non-living components like soil, air, and water. It is essential to conserve and protect our environment for healthy living.
4. Name the two types of waste.
The two types of waste based on decomposition are:
•Biodegradable waste: Decomposes naturally (e.g., food waste, paper, leaves).
•Non-biodegradable waste: Does not decompose easily (e.g., plastic, aluminum cans, electronic waste).
5. What kind of waste is burnt? Is it good for the environment?
Solid waste and toxic chemicals are often burnt in furnaces or incinerators. However, this method causes air pollution and is harmful to the environment. It is not considered an eco-friendly disposal method and should be minimized.