1. HOW ENERGY COMES TO EARTH

3. Atmospheric Ozone

4. 1) Ozone (O 3 ) Formation UV 180 - 240 nm O 2 O + O O 2 + O O 3 2) Ozone Breakdown (Natural) UV 200 - 320 nm O 3 O 2 + O 3) Chlorine Breakdown Cl + O 3 ClO + O 2 ClO + O Cl + O 2 4) Nitrogen Oxide Breakdown NO + O 3 NO 2 + O 2 NO 2 + O NO + O 2

5. What was a major source of Chlorine? Chlorofluorocarbons (CFC’s) (e.g. carbon tetrachloride, methyl chloroform) What were CFC’s used for? Refrigerants, spray can propellants, styrofoam production, and cleaning solvents.

9. Atmospheric Ozone

10. Why Good Science Matters Paid scientist on a radio talk show that will remain nameless – but you know him! 1) Volcanoes give off chlorine in huge amounts, how can human activity be causing the ozone hole? First part of sentence is true 2) CFC’s are heavy molecules, they could never make it up into the stratosphere. First part of sentence is true

12. BURNING OF FOSSIL FUELS

13. ENERGY CONSUMPTION

28. Acid Mine Drainage