Global warming
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Global warming

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Global warming Global warming Presentation Transcript

  • GLOBAL WARMINGGlobal warming is the rise in the averagetemperature of Earths atmosphere andoceans since the late 19th century and itsprojected continuation. Since the early20th century, Earths mean surfacetemperature has increased by about 0.8°C (1.4 °F), with about two-thirds of theincrease occurring since 1980.
  • CAUSESThe Earths atmosphere is composed of many gases. Most abundant are the nitrogen and oxygen. Other gases are called "greenhouse".
  • Because of pollution of the atmosphere, the gases retaine too many heat from the Sun, near to the surface.Temperatures around the world have increased in the last century, and this could cause global climate change.
  • CONSECUENSES Increase in average global temperature. Increased drought in some areas and flooding in others. Increased frequency of hurricane formation. Progressive melting of the polar ice caps, resulting in rising sea levels. Increased precipitation on a global level but fewer days and more rain in torrents. Increased number of hot days, resulted in heat waves.
  • To prevent climate change should reducegreenhouse gas emissions, reducing the amount offossil fuel used (oil, natural gas, coal), and protectforests (they catch and consume carbon dioxide). Italso means reduce our energy consumption, andlook for other energy sources that do not producegreenhouse gases(solar, wind, water or ocean waves).