D, I have to say.. If you have really done 120 hours of research on this and haven't read everything the other side is saying, then you failed class
http://www.eurekalert.org/pub_releas...-gef071906.php
University of California - Santa Barbara
"Gas escaping from the ocean floor may provide some answers to understanding historical global warming cycles and provide information on current climate changes"
"Atmospheric methane is at least 20 times more potent than carbon dioxide"
More:
http://www.sciencedaily.com/releases...0829090326.htm
About the ice caps reflecting heat, along with clouds, ect..
http://www.sciencepoles.org/index.ph...&uid=625&lg=en