HOW ENERGY COMES TO EARTH

Atmospheric Ozone

1) Ozone (O3) Formation UV 180 - 240 nm

O2 O + OO2 + O O3

2) Ozone Breakdown (Natural)

UV 200 - 320 nm

O3 O2 + O

3) Chlorine BreakdownCl + O3 ClO + O2

ClO + O Cl + O2

4) Nitrogen Oxide BreakdownNO + O3 NO2 + O2

NO2 + O NO + O2

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.

Atmospheric Ozone

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

http://volcanoes.usgs.gov/Imgs/Jpg/Kilauea/30410914_045_large.jpg

BURNING OF FOSSIL FUELS

ENERGY CONSUMPTION

Acid Mine Drainage