Class X

Synthetic material/ chemical which depleted Ozone layer is
  1. CFCs
  2. CFLs
  3. CO2
  4. None of above
What is the name given for replenishment of forest?
  1. Afforestation
  2. Silviculture
  3. deforestation
  4. Sericulture
The full form of UV rays is
  1. Ultra violet
  2. Ultra violent
  3. Ultra valve
  4. Ultimate violet
Which of the following is a green house gas?
  1. Nitrogen dioxide
  2. Sulphur dioxide
  3. Carbon dioxide
  4. Carbon monoxide
Floods can be prevented by
  1. Afforestation
  2. Removing top soil
  3. Deforestation
  4. Agriculture
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