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Global warming 4C(3X) Lau shuk ha Chan Tsz Kwan Wong Ying Ying Tao lok yee

Global warming 4C(3X) Lau shuk ha Chan Tsz Kwan Wong Ying Ying Tao lok yee. What is global warming?. Global warming refers to an increase in the global average temperature. In fact, the global average temperature has gone up by around 0.74 since 1850.

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Global warming 4C(3X) Lau shuk ha Chan Tsz Kwan Wong Ying Ying Tao lok yee

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  1. Global warming 4C(3X) Lau shuk ha Chan Tsz Kwan Wong Ying Ying Tao lok yee

  2. What is global warming? • Global warming refers to an increase in the global average temperature. • In fact, the global average temperature has gone up • by around 0.74 since 1850.

  3. Is global warming fact or fiction? • Temperature: • Earth's average surface temperature has increased by about 0.7 since 1880. The right photo show that the average temperature in the earth was been increase about 1-2 in 2000-2009.

  4. Antarctic Ozone Hole In the early 1980s, scientists began to realize that CFCs were creating a thin spot holen the ozone layer over Antarctica every spring. This series of satellite images shows the ozone hole on the day of its maximum depth each year from 1979 through 2010.

  5. Antarctic Sea Ice Because of differences in geography and climate, Antarctica sea ice extent is larger than the Arctic in winter and smaller in summer. Since 1979, Antarctica sea ice has increased slightly, but year-to-year fluctuations are large.

  6. Larsen-B Ice Shelf In early 2002, scientists monitoring daily satellite images of the Antarctic Peninsula watched in amazement as almost the entire Larsen B Ice Shelf splintered and collapsed in just over one month. They had never witnessed such a large area disintegrate so rapidly.

  7. Water Level in Lake Powell Combined with human demands, a multi-year drought in the Upper Colorado River Basin caused a dramatic drop in the Colorado River Lake Powell in the early part of the 2000 decade. The lake began to recover in the latter part of the decade, but as of May 2010, it was still less than 60 percent of capacity.

  8. CARBON COUNTER Carbon dioxide levels in our atmosphere are rising. Left: July 2003. Right: July 2007. Both images show the spreading of carbon dioxide around the globe as it follows large-scale patterns of circulation in the atmosphere. The color codes in these two pictures are different in order to account for the carbon dioxide increase from 2003 to 2007. If the color bar for 2003 were to be used for 2007, the resulting 2007 map would be saturated with reddish colors, and the fine structure of the distribution of carbon dioxide obscured.

  9. Pokhalde Glacier in the Himalayas. Left: Circa 1956, autumn. Right: October 24, 2007

  10. RETREAT OF CARROLL GLACIER, ALASKA Left: August 1906. Right: June 21, 2004

  11. Causes • For economy development so lots of countries ,they are burning of fossil fuels in factories and power plants. • Deforestation the burning process releases carbon dioxide.If the amount of trees are less so that the absorb of carbon dioxide are less. • Population growth because the population growth, so that the demand of natural resources(electricity) also will increase.

  12. The quality of life now a day, people need to raise their quality of life, just like that people love to open the air conditioner in the summer, but they forget that the emission of carbon dioxide is high.And people love to driver their car, they do not like to take the public transport, but that also will increase the emission of carbon dioxide.

  13. Consequences • We know that the global warming is fact. • because the emission of greenhouse gases is increasing,so.... • -the climate is change, temperature is raise. • -the ice of polar area is melt. So the sea levels are raising. • -Changes in world ecosystems. • -the extinction of species will be more serious.

  14. Dramatic change in the water at Dongting Lake in Hunan province, China. Left: September 2, 2002 after flooding. Right: March 19, 2002, before flooding.It will make the people die, and the economics loss.

  15. extinction of species • The report has issued in2007 by the Intergovernmental Panel on Climate Change It tells us that if the emission of greenhouse gases is keep increasing, the third of animals will extinct.

  16. Solutions • International: • -The Kyoto Protocol was signed as an agreement on the reduction of emissions. -the more developed countries will reduce their collectives emissions by 5% from 1990-2012. • -keep more cooperation to control the emission of greenhouse gases for reduce greenhouse effect.

  17. Countries

  18. Individuals effect • At home -we can classify the rubbish -Don’t turn off the electrical engineering power without the remote control

  19. Shopping -use more recyclable bag-use more environment car-buy the electrical that have energy label

  20. Difficulties encounter

  21. The End

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