1. The Greenhouse Effect and Global Warming GHB 2005

2. SUN Earth Atmosphere Some of the heat energy from the Sun reflects off the atmosphere back into space Heat Radiation Some heat enters the atmosphere

3. Some heat energy is absorbed by the ground What happens when heat radiation hits the ground? Some heat energy is reflected back into the atmosphere

4. What happens to heat radiation after it is reflected by the ground? Some heat escapes back into space Some heat is absorbed by… …greenhouse gases CO 2 CH 4

5. The more heat radiation that is absorbed by greenhouse gases… … the warmer the atmosphere becomes. The higher the concentration of greenhouse gases in the atmosphere… … the more heat is absorbed by the atmosphere.

6. What happens if the temperature of the atmosphere increases? The polar ice caps will… …melt

7. …rise Sea levels will…

8. The main greenhouse gases are: - Carbon dioxide - Water vapour - Methane

9. Sources of Greenhouse Gases Burning fuels produces… … carbon dioxide Rotting vegetation produces… …methane Animals produce… Carbon dioxide Methane (Respiration) (Mostly burps, but also… …some farts!)

10. Plants remove carbon dioxide from the atmosphere, in a process called… … photosynthesis Chopping down trees… …increases the amount of carbon dioxide in the atmosphere, by… … reducing the rate of photosynthesis

11. When the valley is flooded, the trees will rot, producing… Mr Burns wants to improve his image buy building a hydroelectric power station. This will mean flooding the Springfield valley. Smithers thinks this may be a bad idea – why? …methane

12. Mr Burns has bought a large tract of South American Rain Forest He wants to turn part of the land into pasture for cattle On the rest of the land, he wants to build a factory for turning the cattle into canned steak pies These pies will be exported to Europe What is the likely impact of this plan on global warming? Explain your answer as fully as possible.