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HCS (Haryana)Prelims2021General Studies
Question
Plastic Bags are a potential hazard to the environment. Which of following Options correctly describe this?
Options
- A They are light in weight and hence cause nuisance by flying
- B Toxic chemicals are used in their production
- C They are non-resistant to heat
- D They are non-biodegradable
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Correct Answer
D They are non-biodegradable
Model Answer
- Polyethene which is used to manufacture plastic poly bags is extracted from either cracked natural glass or refined oil. Hence, Option 2 is incorrect.
- Plastic bags are made by a process called blown film extrusion.
- In the process, polyethene pellets are melted down, blown into a thin material, and manufactured into bags.
- They are non-biodegradable because they can't disintegrate in the soil and contains many chemicals in them which will pollute soil and water. Hence, Option 4 is correct.
- It takes hundreds of years for them to decompose. Also, toxic substances are released into the soil when plastic bags perish under sunlight and, if plastic bags are burned, they release a toxic substance into the air causing ambient air pollution.
- There are varieties of poly bags available that are highly resistant to heat. Hence, Option 3 is incorrect.
- They are lightweight which makes them fly when the wind blows with speed but this does not describe plastic bags correctly. Hence, Option 1 is incorrect.