Question

The pollutant that causes hole in the ozone layer is
1. SF₆
2. Nitrous oxide
3. CFC
4. None of the above

Answer 1

Correct Answer - Option 3 : CFC

The correct answer is CFC.

Explanation:

Human activities that affect the environment: 

The growing world affects the environment around us both in the atmosphere and the ground.

1. The Ozone layer & its depletion.
2. The management of garbage we produce.

We generate a lot of material that is thrown away. Like plastics, glasses, metals, organic waste, chemical waste etc.

Ozone Layer: 

• Ozone (O3) is a molecule formed by three atoms of oxygen. Ozone is a deadly poison.
• Ozone is found in the stratosphere layer of the atmosphere.
• However, at the higher levels of the atmosphere, ozone performs an essential function. It shields the surface of the earth from ultraviolet (UV) radiation from the Sun.
• This radiation is highly damaging to organisms, for example, it is known to cause skin cancer in human beings or can split the DNA.

Its depletion:

• The amount of ozone in the atmosphere began to drop sharply in the 1980s.
• This decrease has been linked to synthetic chemicals like chlorofluorocarbons (CFCs) which are used as refrigerants and in fire extinguishers.
• The government bans those products which contain CFCs.

 

The correct option for the depletion of the ozone layer is Chlorofluorocarbons (CFC's).