(10) Air

A) Air Pollution

1. Air Pollution (Introduction) | National Geographic Video https://www.youtube.com/watch?v=e6rglsLy1Ys

2. Air Pollution (Detailed) Video https://www.youtube.com/watch?v=2ri95j0cShg

B) Acid Rain

1. Acid Rain (Introduction) | National Geographic Video https://www.youtube.com/watch?v=1PDjVDIrFec

2. Acid Rain (Detailed) Video https://www.youtube.com/watch?v=dmgLESI4GGU

C) Ozone

1. The Ozone Layer https://www.youtube.com/watch?v=J0bx2BuxT-I

2. Ozone Damage by CFC (Introduction) | National Geographic https://www.youtube.com/watch?v=aU6pxSNDPhs

3. Ozone Damage by CFC (Detailed) https://www.youtube.com/watch?v=IniJx-vRHG0

D) Greenhouse Effect

1. Greenhouse Effect https://www.youtube.com/watch?v=SN5-DnOHQmE