carbon in the atmosphere

http://en.wikipedia.org/wiki/Global_warming- i think this is cridible because of all the scientist and climate control people that help write this. ^ "Joint science academies' statement: Global response to climate change". Royal Society. June 2005.
http://royalsociety.org/displaypagedoc.asp?id=20742. Retrieved on 2008-01-04

http://www.britannica.com/EBchecked/topic/245233/greenhouse-effect- it think this is credible because all of the scitists that help write this book. not credided.

http://earthguide.ucsd.edu/globalchange/global_warming/03.html- i think that this source is credible. NCAR (National Center for Atmospheric Research)

i beleve that this is true do to the other sites that say it is.