1. Glass bottle
  2. Plastic cups
  3. Aluminium foil
  4. Wool
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1 Answers

Option 4 : Wool

The correct answer is Wool.

  • Biodegradable substances are capable of being decomposed by bacteria or other living
    organisms and thereby avoiding pollution.
    • Paper and wood are examples of Biodegradable substances. 
  • Non-biodegradable substances stay in the environment for thousands of years.
    • They may end up getting in the food chain and cause various health issues to the animals that are in that food chain.
    • Glass bottles, Plastic Cups, and Aluminium Foil are examples of Non-Biodegradable Substances.

Waste and its Types

  • Waste includes the various types of garbage or disposable substances which are no longer in use for any particular individual. 
  • Waste includes
    • biodegradable wastes like food remain waste paper which can be decomposed by microorganisms. 
    • non - biodegradable wastes like polythene cannot be decomposed and cause damage to the environment. 
  • Waste is also classified into solid, liquid, and gaseous wastes
    • Solid waste includes usual home garbage
    • Liquid waste includes certain pollutants that are drained in rivers through sewage
    • Gaseous waste includes pollutants released from industries, vehicles, etc.
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