of course we believe in global cooling.
that's happened many times in the past.
it's just not what's happening at the moment.
there are many things that cause warming and cooling.
extraordinary volcanic eruptions, like Mt Pinatubo have effects that last a year or 2.
Pacific Decadal Oscillation (el nino / la nina) can have effects that last 1-2-5, sometimes a few more years.
the 11 year solar cycle has some effect.
there are other, longer, effects, that have cycles in the thousands, or tens of thousands of years.
however, the CO2 that has been released into the atmosphere, and possibly the methane released from intensive cattle raising, are causing rising temperatures at the moment.
now, my ego is not such that i'm prepared to tell folks that i know more about climate than the majority of the scientific community.
many other folks apparently don't suffer from that same shortcoming.
the majority of the scientific community is clearly stating that AGW is a problem.
NAS, NOAA, NSF, NASA, EPA, MIT, UCLA all agree. AGW (Anthropogenic Global Warming) is a serious problem.
http://www.nasonline.org/site/PageServer
"May 19, 2008: The National Academies have released the 2008 edition of "Understanding and Responding to Climate Change," a free booklet designed to give the public a comprehensive and easy-to-read analysis of findings and recommendations from our reports on climate change."
http://dels.nas.edu/dels/rpt_briefs/climate_change_2008_final.pdf <== here's a good description.
http://www.funnyweather.org/ <== this is a more lighthearted link.
http://en.wikipedia.org/wiki/Greenhouse_effect <== and one with too much detail.
http://www.sciencefriday.com/videos/watch/10125 <== Michael Oppenheimer, a member of the Nobel Peace Prize-winning Intergovernmental Committee on Climate Change and professor at Princeton
http://www.lenntech.com/greenhouse-effect/global-warming-history.htm <== btw this is not a new idea.
http://lwf.ncdc.noaa.gov/oa/climate/globalwarming.html
http://www.ncdc.noaa.gov/paleo/globalwarming/home.html
http://lwf.ncdc.noaa.gov/oa/climate/research/2008/perspectives.html
http://www.exploratorium.edu/climate/ <== not regulated by the government.