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Global warming

  1. 1. • Global warming is the temperature rising each year. • Scientists say that the earth has warmed up about 1 degree Fahrenheit in the last 100 years. • The rate of change is speeding up, 100 years from now scientists say that the earth will be 10 degree hotter!
  2. 2. • Global warming is caused by CO2 and other gases such as Methane given off by burning fuel and wood. • These gases are called by green house gases mainly produced by the factories and cars. • Green house gases lets in heat, but doesn’t let the heat get out.
  3. 3. • Some solar radiation passes through the clear atmosphere. Most radiation is absorbed by the earth and warm it. • Some of the infrared radiation passes through the atmosphere, and some is absorbed and re- emitted in all directions by green house molecule. The effect of this is to warm the earth’s surface and the atmosphere.
  4. 4. • Global warming isn’t all bad, without it we could freeze to death. • But other than that, there’s is nothing that’s good about global warming.
  5. 5. • If there is too much greenhouse gases the polar ice caps would melt and flood low lying land. • Too much global warming can also cause more forest fires and stronger hurricanes. • It can also become the cause of the end of the world because, it would warm up the earth so much the earth would blow up.
  6. 6. • Global warming is happening constantly. And it’s our fault. • Global warming is also happening world widely. • A new gas called trifluoromethyl sulfur pentaflouride is generate heat more than other known green house gases. Although it is very rare in atmosphere.
  7. 7. All other sources 1% Motor vehicles 55% Utilities 22%
  8. 8. • We can slow down Global warming by riving hybrids, riding bikes, and walking a little more. • We can also help by using cleaner energy sources such as solar power, wind power and hydro power.
  9. 9. THANKS

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