National Geographic on Global Warming


	National Geographic on Global Warming

hudgal1

5-27-2007 1:53 PM

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tags:

global warming, greenhouse gases

1 Comment |

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5-27-2007 2:23 PM

zephyr1

This is what I have always believed. That the natural environment cannot compensate what man has contributed to. Especially with deforestation.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/a37bb7fe-15dd-4fbf-92d6-62648a33b5d7/54858D6C-D062-47FE-A3B2-1568811D201C/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://news.nationalgeographic.com/news/2004/12/1206_041206_global_warming_2.html" href="http://news.nationalgeographic.com/news/2004/12/1206_041206_global_warming_2.html" style="font-size: 11px;">news.nationalgeographic.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://news.nationalgeographic.com/news/2004/12/1206_041206_global_warming_2.html"><P>
• Since the 1860s, increased industrialization and shrinking forests have helped raise the atmosphere's CO2 level by almost 100 parts per million—and Northern Hemisphere temperatures have followed suit. Increases in temperatures and greenhouse gasses have been even sharper since the 1950s. 
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Water vapor is the most important greenhouse gas. Carbon dioxide, methane and nitrous oxide also contain heat and help keep Earth's temperate climate balanced in the cold void of space. Human activities, burning fossil fuels and clearing forests, have greatly increased concentrations by producing these gases faster than plants and oceans <A href="http://news.nationalgeographic.com/news/2004/07/0715_040715_oceancarbon.html">can soak them up</A>. The gases linger in the atmosphere for years, meaning that even a complete halt in emissions would not immediately stop the warming trend they promote. 
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