GLOBAL WORMING
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The main causes of global warming are greenhouse gases such as carbon dioxide, methane, nitrous oxide, and CFCs. Carbon dioxide is emitted primarily from power plants burning fossil fuels for electricity and from vehicle gasoline combustion. Methane is emitted from sources like rice paddies, cattle, bogs, and fossil fuel production. Nitrous oxide comes from fertilizer use, cars, and burning organic matter. CFCs are emitted from refrigerators, air conditioners, and spray/foam production. Carbon dioxide accounts for 60% of greenhouse gases and increases 0.3-0.5% annually.
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GLOBAL WORMING
- 2. This presentation is about:
- 4. Main Cause of Global Warming:
- 5. Main greenhouse gases: Carbon Nitrous Methane C.F.C Dioxide Oxide
- 6. • The major source of CO2 is the power plants. These power plants emit large amount of CO2 produced from burning of fossil fuels for the Carbon purpose of electricity generation. About 20% of CO2 emitted in the Dioxide atmosphere comes from burning of gasoline of the vehicles. • Methane (CH4) is 20 times as effectual as CO2 at entrapping heat in the atmosphere. Methane is obtained from resources such as rice paddies, Methane bovine flatulence, bacteria in bogs and fossil fuel manufacture. • The main sources of Nitrous Oxide (N20) include nylon and nitric acid production, cars with catalytic converters, the use of fertilizers in Nitrous agriculture and the burning of organic matter. Oxide • The main sources of CFCs (Chlorofluorocarbons) are use of refrigerators, air conditioners and the production of spray and foam. CFC
- 7. Greenhouse gases Approximate rate (%) Annually increase (% per year) Carbon Dioxide 60 0.3-0.5 (CO2) Methane 20 2-4 (CH4) Nitrous Oxide 6 0.2-0.3 (N20) CFC 14 1-5