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Global Warming. Part 3 - Man-made or natural? (1of2)

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Uploaded by on Apr 2, 2008

Global Warming. Part 3 - Man-made or natural (1of2)

In this video speaks Richard S. Lindzen, Charles D. Keeling, Richard C. J. Somerville, Pieter Tans.


This video is the part of PBS documentary "Global Warming. What's Up With The Weather?"
http://www.pbs.org/wgbh/warming/

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All Comments (45)

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  • When this talks about venus, it fails to include that the Co2 levels on venus are 960,000 parts per million while earth is 300 parts per million...

  • Deciduous trees give off O2 (Oxygen) while in the process of photosynthesis. Photosynthesis can only occur during daylight periods and when the tree is not dormant. During the trees dormancy and at night, trees breath in O2 and breath out CO2 (Carbon Dioxide).

    Maybe we should cut all the trees down. I think there the real cause. Brother, when are these people going to learn man has nothing or very minor effects on anything on earth.

  • @x11115 Using wikipedia as a source doesnt prove anything, maybe post the source from the site... then i will believe you. :D Not saying you're wrong, just use a different source like an actual research study.

  • mars is frigid because of it's distance from the sun. Earth only has life because it is in what they call the goldie locks zone.

  • 6:40 that scientist statement was completely false about mars. from wikipedia: "The atmosphere on Mars consists of 95% carbon dioxide, 3% nitrogen, 1.6% argon, and contains traces of oxygen, water, and methane. "

    That means there's a high percentage of co2.

  • 6:40 At the surface, the atmosphere of Mars contains approximately 95.3 percent CO2 by volume. I think he is incorrect about mars.

  • Greenhouse effect is simple name explaining that heat is trapping.

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