AP BIOLOGY

Detailed explanation-1: -Gaseous CFCs can deplete the ozone layer when they slowly rise into the stratosphere, are broken down by strong ultraviolet radiation, release chlorine atoms, and then react with ozone molecules. See Ozone Depleting Substance.)

Detailed explanation-2: -Researchers found evidence that linked the depletion of the ozone layer to the presence of chlorofluorocarbons (CFCs) and other halogen-source gases in the stratosphere. Ozone-depleting substances (ODS) are synthetic chemicals, which were used around the world in a wide range of industrial and consumer applications.

Detailed explanation-3: -The ozone layer is a thin part of Earth’s atmosphere that absorbs almost all of the sun’s harmful ultraviolet light. “Ozone holes” are popular names for areas of damage to the ozone layer.

Detailed explanation-4: -Molina discovered that chlorofluorocarbons (CFCs) could deplete Earth’s atmospheric ozone layer, which blocks the sun’s damaging ultraviolet rays. When the scientists reported their findings in 1974, CFCs were widely used as refrigerant gases and as propellants in aerosol sprays.

Detailed explanation-5: -Chlorofluorocarbons (CFC) are responsible for the depletion of the Ozone layer. The Ozone Layer helps keep out harmful UV rays that can otherwise cause skin cancer in humans and burn plants. CFCs cause chemical reactions that cause the ozone molecules to break down, thus reducing its UV absorption capability.