The hole in the ozone layer has been brought about by anthropogenic emissions of ________.
A) carbon dioxide
B) methane
C) chlorofluorocarbons
D) water vapor

Question

Quizplus · Accepted Answer

Chlorofluorocarbons (CFCs) are synthetic chemicals that are used in refrigeration, air conditioning, and various industrial processes. When CFCs are released into the atmosphere, they can rise up into the stratosphere where they are broken down by ultraviolet (UV) radiation. This chemical breakdown releases chlorine atoms, which then catalyze the destruction of ozone molecules. This process leads to the formation of the hole in the ozone layer. Carbon dioxide, methane, and water vapor do not directly contribute to the depletion of the ozone layer.

The Hole in the Ozone Layer Has Been Brought About