1. Addition of harmful smoke, gases and chemicals to the environment in large quantities is called ______.
    a) Air
    b) Pollution
    c) Wind
    d) Storm
    Answer: b
  2. Cutting down of trees for farming and housing purposes is called ______.
    a) Reforestation
    b) Deforestation
    c) Afforestation
    d) Forestation
    Answer: b
  3. Releasing chemicals, waste, plastics into the water is called ______.
    a) Sound pollution
    b) Land pollution
    c) Water pollution
    d) Air pollution
    Answer: c
  4. Scientists are warning us that the rise in earth’s temperature causes ______.
    a) Deforestation
    b) Land sliding
    c) Pollution
    d) Global warming
    Answer: d
  5. Shyam avoids the use of plastic and chemical fertilizers. He is practising a ______.
    a) Green lifestyle
    b) Modern lifestyle
    c) Busy lifestyle
    d) Unhealthy lifestyle
    Answer: a