# What is the importance of the ozone shield and how do CFCs deplete ozone?

##### 1 Answer
Feb 28, 2017
• ozone shield is important because ozone in stratosphere acts as shield to protect all types of life on earth from harmful UV rays.

#### Explanation:

• CFC is used in refrigerators.When they are discharged in lower atmosphere they move upward and reach stratosphere .
• In stratosphere ,UV rays acts on them as rleasing Cl atoms.
• Cl degrades ozone releaing molecular oxygen .
• Cl atoms re not consumed in the reaction.Once CFC are added to stratosphere ,they have permanent and continuous effects on ozone levels.