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→Conflicting Opinions/Data: Added Mars global warming
Using older data collected for the theory, as far back as a hundred or more years ago, scientists argued over if the globe was cooling or warming. <ref>http://www.saveportland.com/Climate/index.html</ref>
Using older data collected for the theory, as far back as a hundred or more years ago, scientists argued over if the globe was cooling or warming. <ref>http://www.saveportland.com/Climate/index.html</ref>
Mars' polar caps are melting.<ref>http://science.nasa.gov/headlines/y2003/07aug_southpole.htm</ref> Yet there is no proof of life on Mars.<ref>http://www.nasa.gov/home/hqnews/2005/feb/HQ_05052_mars_claim.html</ref> Therefore one can conclude that Mars' global warming is not caused by lifeforms. Global warming on Mars is caused by solar activity from the sun, which might hint at the cause of global warming on Earth.<ref>http://news.nationalgeographic.com/news/2007/02/070228-mars-warming.html</ref>
== Global warming advocacy sites ==
== Global warming advocacy sites ==