Question

The main pollutants responsible for causing the greenhouse effect, acid rain, and ozone layer depletion are :

1.

H2​O, CO and CFCs respectively

2.

CH4, CO2, and NOx respectively

3.

CO2, CFCs and O3 respectively

4. CO2, SO2, and CFCs respectively

Answer 1

Correct Answer - Option 4 : CO2, SO2, and CFCs respectively

The correct answer is CO2, SO2, and CFCs respectively.

  

• Greenhouse effect, a warming of Earth’s surface and troposphere caused by the presence of water vapor, carbon dioxide, methane, and certain other gases in the air.
  • The atmosphere allows most of the visible light from the Sun to pass through and reach Earth’s surface.
  • As Earth’s surface is heated by sunlight, it radiates part of this energy back toward space as infrared radiation.
  • This radiation, unlike visible light, tends to be absorbed by the greenhouse gases in the atmosphere, raising its temperature.
  • The heated atmosphere in turn radiates infrared radiation back toward Earth’s surface.

• Acid Rain
  • Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air.
  • These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.
•  Ozone Layer Depletion
  • Ozone layer depletion is the gradual thinning of the earth’s ozone layer in the upper atmosphere caused due to the release of chemical compounds containing gaseous bromine or chlorine from industries or other human activities.
• Chlorofluorocarbons are the most abundant ozone-depleting substance.