VIDEO ABOUT GLOBAL WARMING

This is the final task produced by a group of students from 4º2ºEyA TM. There is only one sentence I want to correct. In the video you can read "THEY CAN BY MAN MADE OR BY NATURAL CAUSES" and it should say "IT CAN BE MAN MADE OR PRODUCED BY NATURAL CAUSES" Enjoy it, I love it and I feel very proud of my students. Follow this link http://www.youtube.com/watch?v=llJNtaJfFJc&feature=plcp