Bibliografia

Paginas URL:

http://www.google.pt/search?sourceid=navclient&gfns=1&ie=UTF-8&rlz=1T4RNWN_pt-PTPT320PT332&q=o+que+%c3%a9+a+defloresta%c3%a7ao

http://www.google.pt/search?sourceid=navclient&gfns=1&ie=UTF-8&rlz=1T4RNWN_pt-PTPT320PT332&q=modos+de+defloresta%c3%a7%c3%a3o

http://campus.fct.unl.pt/afr/ipa_9899/grupo0018_altglobais/causas.htm