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Biology Class 12 NCERT Solutions: Chapter 15 Biodiversity and Conservation Part 3

Q.9 What measures, as an individual, you would take to reduce environmental pollution?

Answer:

Illustration: Biology Class 12 NCERT Solutions: Chapter 15 Biodiversity and Conservation Part 3

The following initiatives can be taken to prevent environmental pollution:

  1. Measures for preventing Air pollution
    • Planting more trees
    • Use of clean and renewable energy sources such as CNG and bio-fuels
    • Reducing the use of fossil fuels
    • Use of catalytic converters in automobiles
  2. Measures for preventing water pollution
    • Optimizing the use of water
    • Using kitchen waste water in gardening and other household purposes
  3. Measures for controlling Noise pollution
    • Avoid burning crackers on Diwali
    • Plantation of more trees
  4. Measures for decreasing solid waste generation
  • Segregation of waste
  • Recycling and reuse of plastic and paper
  • Composting of biodegradable kitchen waste
  • Reducing the use of plastics

Q.10 Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?

Answer:

  • Yes, there are various kinds of parasites and disease-causing microbes that we deliberately want to eradicate from the Earth.
  • Since these micro-organisms are harmful to human beings, scientists are working hard to fight against them.
  • Scientists have been able to eliminate small pox virus from the world through the use of vaccinations.
  • This shows that humans deliberately want to make these species extinct. Several other eradication programmes such as polio and Hepatitis B vaccinations are aimed to eliminate these disease-causing microbes.