Climate Change and Global Warming

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Presentation made by Irina Ionescu , 8th grade, Scoala Gimnaziala Magura.

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Climate Change and Global Warming

  1. 1. by Irina Ionescu 8TH grade, Scoala Gimnaziala Magura
  2. 2. What causes Earth’s climate to change? Carbon dioxide and other air pollution that is collecting in the atmosphere like a thickening blanket, trapping the sun's heat and causing the planet to warm up.
  3. 3. What are greenhouse gases? Any gases that cause the “greenhouse effect!”
  4. 4. Is the earth really getting hotter? Yes. Although local temperatures fluctuate naturally, over the past 50 years the average global temperature has increased at the fastest rate in recorded history. And experts think the trend is accelerating: the 10 hottest years on record have all occurred since 1990. Scientists say that unless we curb global warming emissions, average U.S. temperatures could be 3 to 9 degrees higher by the end of the century.
  5. 5. How can we cut car pollution? Cost-effective technologies to reduce global warming pollution from cars and light trucks of all sizes are available now. There is no reason to wait and hope that hydrogen fuel cell vehicles will solve the problem in the future. Hybrid gas-electric engines can cut global warming pollution by onethird or more today; hybrid sedans, SUVs and trucks from several automakers are already on the market.
  6. 6. Observed Changes and Effects
  7. 7. Warming of Climate  Warming of the climate is definitely occurring and can be observed by the: • Increases in global sea and air temperatures • Widespread melting of snow and ice • Rising global sea level
  8. 8. Temperature Change Data 1880-1884
  9. 9. 1936-1940
  10. 10. 1986-1990
  11. 11. 2003-2007
  12. 12. Other Observed Changes and Effects  89% of current changes in ecosystems are consistent with changes expected due to global climate change  Carbon dioxide, methane, and nitrous oxide levels in atmosphere have increased greatly due to human activities since 1750 and now far exceed previous levels  Carbon dioxide has increased by approximately 80% since 1970
  13. 13.  Warming and sea level rise will continue and will probably occur more quickly than what we’ve already seen  Even if greenhouse gases are stabilized, this will probably continue to occur for centuries  Some effects may be permanent
  14. 14. • Effects on Ecosystems – Coral systems cannot handle higher temperatures well – Wildfires will increase – Up to 30% of species will be at increased risk for extinction due to the rapid changes in their ecosystems
  15. 15. There are several types of options…  Reduce emissions of greenhouse gases  Attempt to develop alternatives energies  Allow emission to continue, but prepare for global climate changes  Allow emissions to continue as normal and leave preparations up to individual countries  Combine any of these ideas

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