Discussion
When studying the atmosphere, we learn that it is layered and reaches upwards to 90 miles. Another discussion brings up the ozone layer and a hole in the ozone layer that is either growing or shrinking.
For our discussion: what is the ozone level? What does it do for the planet? If there is a hole in it, what's the BIG deal??
The response should include a reference list. Double-space, using Times New Roman 12 pnt font, one-inch margins, and APA style of writing and citations.