100+ Environmental Science MCQ Questions and Answers - 3

Question: 11

What is atmosphere?

The envelope of air around the earth is called atmosphere.

Question: 12

What is social forestry?

Social forestry is growing of trees on available land for the purpose outside natural forest areas and managing the same with intimate involvement of local people.

Question: 13

What is ozone hole?

Ozone depletion extending over the entire Antarctic formed a hole in the ozone layer known as ozone hole.

Question: 14

What is ozone depletion?

Gases such as NO, NO₂, Cl₂ react with ozone easily. When these gases are released in excess the amount of ozone in the atmosphere is reduced. This is known as ozone depletion.

Question: 15

What is endangered species?

When a species is represented by a fewer number in its natural habitat, then it is called endangered species.