greenhouse gas

http://yosemite.epa.gov/oar/GlobalWarming.nsf/UniqueKeyLookup/SHSU5BUM9T/$File/ghg_gwp.pdf

http://lwf.ncdc.noaa.gov/oa/climate/globalwarming.html

http://www.epa.gov/climatechange/

http://www.epa.gov/climatechange/emissions/downloads09/07Intro.pdf

http://vienna.usembassy.gov/en/download/pdf/kyoto.pdf

http://www.eoearth.org/article/Kyoto_Protocol_and_the_United_States

http://hdgc.epp.cmu.edu/teachersguide/teachersguide.htm

http://www.ghgonline.org/resources.htm

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