3)
The ozone layer in the stratosphere protects Earth from the sun's ultraviolet radiation. Where does the ozone come from?
A) The ozone is released from the oceans as part of the carbon cycle.
B) The ozone is a byproduct of combustion in gasoline and diesel engines.
C) The ozone is created when chloroflourocarbons (CFCs) react with oxygen
and water vapor.
D) The ozone is produced when sunlight breaks apart oxygen molecules in the upper atmosphere.