Class VIII

Which of the following does not cause air pollution?
  1. Smoke
  2. Carbon monooxide
  3. Forest fires
  4. Plastic wastes on land
Which of the following is responsible for polluting rivers?
  1. Washing clothes in rivers.
  2. Throwing polythene bags.
  3. Throwing idols of Gods
  4. All of these
Most polluted river in the world is
  1. Yamuna
  2. Cavery
  3. Chenab
  4. Ganga
Pollution of water is responsible for
  1. Oil refineries
  2. Paper factories
  3. Sugar mills
  4. All
Green House gas is
  1. Nitrogen
  2. Oxygen
  3. Methane
  4. Carbon dioxide
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