LEARNING OBJECTIVES:
1) Explain why we need an ozone layer.
2) Identify the chemical that is responsible for destroying the ozone layer.
3) List common household items that use/used chlorofluorcarbons (CFC's)?
4) Explain why the ozone hole is getting smaller.
Discuss ozone hole and other related environmental issues
In the 1980s, scientists began to realize that ozone-depleting chemicals, such as chlorofluorocarbon (CFCs), were creating a thin spot—a hole—in the ozone layer over Antarctica. Through an international effort to decrease the use of CFCs, the ozone layer is starting to mend, and scientists believe it should mostly recover by the middle of the 21st century. This series of satellite images shows the ozone hole on the day of its maximum depth from 1979 through 2018.