The sun's heat cannot escape the earths atomasphere because of the pollution blocking them from escaping.
1.The site is from a New York Times article.
2. The credintials that the source has is th at he is the head of Harvard's center on science and technology.
3. This source is credible because the person being interviewed is the head of harvard's center on science and technology.
4. My source says that the polution is a major factor in global warming.
5. yes i do believe the source because i feel that poltion is a key contributer to global warming.
http://www.nrdc.org/globalWarming/f101.asp?gclid=CI3_sMP-8pkCFQzxDAodg22MRw#1
http://topics.nytimes.com/topics/news/science/topics/globalwarming/?scp=2&sq=global%20warming&st=cse#
http://www.agreencross.org/targets.asp
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