1. Global Warming zQ:What is global warming? zA:Global warming means a progressive rise in the mean annual temperature in the whole world. zQ:What causes global warming? zA:It’s mainly due to the greenhouse effect.

2. Greenhouse effect

3. Natural greenhouse effect

4. Enhanced greenhouse effect

5. Types of greenhouse gases zcarbon dioxide (CO2) zmethane (CH4) znitrous oxide (N2O) zchlorofluorocarbons (CFCs) zozone (O3) zwater vapour (H2O)

6. Carbon dioxide

7. Methane

8. Nitrous Oxide

9. Chlorofluorocarbons

12. Consequences of greenhouse effect zRise in sea level zDisease to human e.g. skin cancer zDying forests zChange in climate

13. Impact on human life zEconomic Impact:impact on low-lying coastal areas and islands zAgricultural Impact:changing the soil moisture contents zEffects on Aquatic systems:reduce fish populations, and the abundance of freshwater species