1. Part Two

2. Thin layer of oxygen in the atmosphere that blocks UV rays from the sun. UV harms people, animals, plants and esp. plankton Ozone layer was/is destroyed by CFCs Chlorofluorocarbons Refrigerators, air conditioners, aerosol spray cans

3. 1987 Developing countries could use CFCs until 2000 Industrialized nations cut use of CFCs Still problems today All CFCs need to be phased out

4. Pg 431 Atmosphere traps heat energy from the sun Added gases from people?, vulcanoes, meteor impacts increse CO2 levels in the atmosphere more heat energy is trapped Temperature increases

5. Effects may include More violent storms Melting glaciers Polar ice caps Increased sea levels Plant and animal life

6. Problems in the North Polar Bears Earlier spring Loss of permafrost = shrinking shorelines Warmer waters and fewer plankton=less salmon Tourism/ Winter sports Forest fires/ drought

7. Reduce greenhouse emissions by 6% by 2012 We are nowhere near reaching this goal!!!! Which province has come under fire lately for its greenhouse gas emissions