Question 2:

__________ and agricultural activities are responsible for emission of greenhouse gases into the air. Trees clean the air by storing carbon dioxide, but due to heavy deforestation air pollution is on the rise.

Question 3:

The seas, ocean, rivers, lakes etc form the ________.

Question 4:

The zone above troposphere is called the ________. It is rich in ozone gas, which forms the ozone layer. 

Question 5:

The air that we breathe is present in the first zone of earth known as _______. It is 10 to 12 km from the surface of the earth.

Question 6:

Air pollution causes a variety of environmental effects such as _______, ______, ________, damage to crops and forests, and climate change.

Question 7:

____ is a good conductor of sound, we can hear speech or music or noise in the presence of _____.

Question 8:

Oxygen and _________ of stratosphere protect us from the ill-effects of ultraviolet light rays of sunlight.

Question 9:

Major air pollutants include ______, ______, ______.

Question 10:

______ leads to blocking of sunlight from entering water bodies and reduces oxygen values in water, which creates an inhabitable environment.