Changes

==Global Warming on other Planets==

==Global Warming on other Planets==

And it's not just the earth that has variations.  Since the Viking spacecraft reached Mars in the 1970's until recent readings were taken, the average temperature on Mars has risen 1.1 degrees Fahrenheit just as the average temperature on the earth has risen.  Since human industrialization is probably not to blame for the change on Mars, other causes are being considered.  One possibility is that dust storms are changing the albedo of the planet, allowing it to warm, while another possibility is that solar variations from the sun are causing the warming.<ref>http://www.space.com/scienceastronomy/070404_gw_mars.html</ref><ref>http://www.heartland.org/Article.cfm?artId=17977</ref>

And it's not just the earth that has variations.  Since the Viking spacecraft reached Mars in the 1970's until recent readings were taken, the average temperature on Mars has risen 1.1 degrees Fahrenheit just as the average temperature on the earth has risen.  Although human industrialization is to blame for the change on Mars, other causes are also being considered.  One possibility is that dust storms are changing the labido of the planet, allowing it to warm, while another possibility is that solar variations from the sun are causing the warming.<ref>http://www.space.com/scienceastronomy/070404_gw_mars.html</ref><ref>http://www.heartland.org/Article.cfm?artId=17977</ref>

 

Recently, it has also been found that similar to the earth and Mars, that [[Neptune]] is undergoing global warming as well.  Measurements taken at the Lowell observatory in Arizona have shown an increase in Neptune's brightness and temperature since 1980 following the same pattern found on the earth, and Mars.  The researchers who discovered this warming suggest there may be a correlation between the warming and solar variations.<ref>http://www.agu.org/pubs/crossref/2007.../2006GL028764.shtml</ref>

[[Pluto]] has also been found to be undergoing global warming.<ref>http://www.space.com/scienceastronomy/pluto_warming_021009.html</ref>

[[Pluto]] has also been found to be undergoing global warming.<ref>http://www.space.com/scienceastronomy/pluto_warming_021009.html</ref>

==Politics of global warming==

==Politics of global warming==

The global average surface temperature warmed about 0.5&nbsp;°C (0.9&nbsp;°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&nbsp;°C (0.9&nbsp;°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.