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Our Environment — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceOur Environment3 Marks
Question
How does a biodegradable waste differ from a non-biodegradable waste? Give two examples of non- biodegradable wastes which pollute our environment.
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Answer

Bioderghradable Wastes:
  • Those waste materials which can be broken down to non-poisonous substances in nature by the action of microorganisms (like bacteria) are called biodegradable wastes.
  • They get recycled and therefore do not require dumping sites.
  • They do not cause any pollution to the soil.
Example: Paper, Wood, etc.
Non-Biodegradable Wastes:
  • Those waste materials which cannot be broken down to non-poisonous substances in nature are called non-biodergradable wastes.
  • They cannot be recycled easily and therefore are to be dumped which requires lot of space. This cause wastage of land.
  • The harmful chemical leach out of these wastes when they are dumped in soil. This leads to soil pollution.
Example: DDT, Plastic and Polythene bags.

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