Alguns Links para maiores informações :

http://www.ucv.mct.pt/divulgacao/eventos/diasemcarros/azoto.asp

http://members.ozemail.com.au/~kline/issues/environment/air/greenhouse/index.html

http://www.cru.uea.ac.uk/~ricardo/pdf/flad1.pdf

http://yosemite.epa.gov/oar/globalwarming.nsf/content/index.html

http://www.erin.gov.au/index.html

http://www.rudzerhost.com/ambiente/

http://www.terravista.pt/Ancora/1245/

http://www.atm.ch.cam.ac.uk/tour/index.html#toc