Changes

==Politics of global warming==

==Politics of global warming==

The global average surface temperature warmed about 0.5 °C (0.9 °F) over the second half of the 20th Century, and to some the warming appears to be related to increases in carbon dioxide and other greenhouse gases. The possibility of adverse consequences has become a major concern for environmentalists.

The global average surface temperature warmed about 0.5 °C (0.9 °F) over the second half of the 20th Century, and to some the warming appears to be related to increases in [[carbon dioxide]] and other greenhouse gases. The possibility of adverse consequences has become a major concern for environmentalists.

Assessments of climate science by the United Nations (see [[IPCC]] - ''Intergovernmental Panel on Climate Change'')

Assessments of climate science by the [[United Nations]] (see [[IPCC]] - ''Intergovernmental Panel on Climate Change'')

have claimed that scientists are 90% sure that over 50% of the observed global warming in recent decades is human-caused, and that continued global warming should be expected over at lease the next century. Science published a literature search by Naomi Oreskes concluding that "scientific consensus" supports the IPCC reports. <ref>http://www.sciencemag.org/cgi/content/full/306/5702/1686]</ref>

have claimed that scientists are 90% sure that over 50% of the observed global warming in recent decades is human-caused, and that continued global warming should be expected over at least the next century. ''Science'' published a literature search by Naomi Oreskes concluding that "scientific consensus" supports the IPCC reports. <ref>http://www.sciencemag.org/cgi/content/full/306/5702/1686]</ref>

Several prominent scientists have pointed out the [[politicized science]] of the UN's assessment methods. The scientific reports are submitted to a panel of representatives appointed by each country in the IPCC. Several scientists have complained about their work being misrepresented by the U.N.

Several prominent scientists have pointed out the [[politicized science]] of the UN's assessment methods. The scientific reports are submitted to a panel of representatives appointed by each country in the IPCC. Several scientists have complained about their work being misrepresented by the U.N.

There is wide agreement among the American public that Global Warming is a reality. A poll conducted March 11-14 of 2007 found that the majority of the American public (59%) believes we are already seeing the effects of Global Warming, an additional 3% and 8% respectively believe they will see the effects with in a few years or within their lifetime, and 19% believe that Global Warming will be seen, not in their lifetime, but in future generations—only a small minority 8% believe that Global Warming will never happen. <ref>Poling report on Gallup poll for March 11-14, 2007[http://www.pollingreport.com/enviro.htm]</ref>.

There is wide agreement among the American public that global warming is a reality. A poll conducted March 11-14 of 2007 found that the majority of the American public (59%) believes we are already seeing the effects of global warming, an additional 3% and 8% respectively believe they will see the effects with in a few years or within their lifetime, and 19% believe that global warming will be seen, not in their lifetime, but in future generations—only a small minority (8%) believe that global warming will never happen. <ref>Poling report on Gallup poll for March 11-14, 2007[http://www.pollingreport.com/enviro.htm]</ref>.

== Scientists ==

== Scientists ==