NATIONAL GEOGRAPHIC

ENVIRONMENT - STATE OF THE EARTH

http://video.nationalgeographic.com/video/player/environment/global-warming-environment/

http://environment.nationalgeographic.com/environment/

http://www.nationalgeographic.pt/articulo_print.jsp?id=1212437

NATURAL DISASTERS

http://environment.nationalgeographic.com/environment/natural-disasters/forces-of-nature.html?section=e

GLOBAL WARMING

http://environment.nationalgeographic.com/environment/global-warming/

HABITATS

http://environment.nationalgeographic.com/environment/habitats/