Web pages

Games:
http://resources.kaboose.com/games/earthday.html

http://www.ecokids.ca/pub/kids_home.cfm


Info:
http://www.globalwarming.org/

http://www.globalissues.org/issue/168/environmental-issues

Bibliography:
http://www.ecopibes.com/problemas/index.html

http://environment.about.com/od/globalwarming/tp/globalwarmtips.htm
Excel:
http://www.mediafire.com/?sharekey=47cb3c0399773747d6baebe61b361f7ce04e75f6e8ebb871