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

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??