Enlaces:
[1] http://calentamientoglobal.wordpress.com/2007/01
[2] http://es.wikipedia.org/wiki/Calentamiento_global
[3] http://www.cambioclimaticoglobal.com
[4] http://www.climateark.org
[5] http://www.epa.gov/climatechange
[6] http://www.climatechangeeducation.org
[7] http://www.nrdc.org/globalWarming
[8] http://www.ucsusa.org/global_warming
[9] http://www.globalwarmingart.com/
[10] http://www.ncdc.noaa.gov/oa/climate/globalwarming.html
[11] http://www.globalwarming.net
[12] http://www.climatehotmap.org
[13] http://www.globalwarming.org
[14] http://www.ipcc.ch
[15] http://www.worldviewofglobalwarming.org
[16] http://unfccc.int
[17] http://www.coalicionventanasverraco.org/