three questions about the ozone...?

Question

i need links with answers to these questions:
(1. what does the ozone layer do?
(2. how is it being destroyed?
(3. what evidence is there to prove that it is being destroyed?

Answer 1

http://en.wikipedia.org/wiki/Ozone ::

Answer 2

Geeze are they still teaching this in schools with old facts ?

1) It's a part of the atmosphere; it absorbs ultraviolet light
2) It's not, it's replenishing since CFC's were banned and the sunspot cycle lessened
3) Absolutely none