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Patrick Aroune

NCDC: Global Warming - 1 views

  • There is no scientific debate on this point. Pre-industrial levels of carbon dioxide (prior to the start of the Industrial Revolution) were about 280 parts per million by volume (ppmv), and current levels are about 370 ppmv.
  • Without a natural greenhouse effect, the temperature of the Earth would be about zero degrees >
  • Without a natural greenhouse effect, the temperature of the Earth would be about zero degrees F
  • ...2 more annotations...
  • The warming has not been globally uniform. Some areas (including parts of the southeastern U.S.) have, in fact, cooled over the last century. The recent warmth has been greatest over North America and Eurasia between 40 and 70°N. Warming, assisted by the record El
    • Patrick Aroune
       
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  • ing on the period over which they are computed. Temperature trends in the lower troposphere (between about 2,500 and 26,000 ft.) from 1979 to the present, the period for which Satellite Microwave Sounding Unit data exist, are small and may be unrepresentative of longer term
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meggie

World War I, The Dual Alliance Between Austria-Hungary and Germany - 2 views

  • Empires be attacked by Russia
  • bound to come to the assistance
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    This means that everyone had to work together if one nation was introuble other nations were forced to help. This shows the importance of alliances.
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