English Language Assignment

 The destruction of the ozone layer is mainly due

to the increasing levels of chlorofluorocarbons (CFCs) in the atmosphere.  CFCs are very reactive chemicals that contain chlorine, carbon and fluorine.

CFCs are used as coolants in air conditioners

and refrigerators, propellants in aerosol cans and foaming agents in the making of styrofoam packaging. CFCs are extremely stable and can remain in the environment for as long as 75 to 100 years.

Once in the stratosphere, CFCs are broken

down by ultraviolet rays. As a result, the highly reactive chlorine radicals (Cl˚) are released. These chlorine radicals break down the ozone molecules (O3) in a chain reaction.

We have to reduce or stop the use of

chlorofluorocarbons (CFCs) Replace chlorofluorocarbons (CFCs) with hydrochlorofluorocarbons (HCFCs) and hydrofluorocarbons (HFCs). Unlike CFCs, these gases break down in the atmosphere and return to Earth in the form of rainwater.