Video link about global warming

http://video.google.com/videoplay?docid=8453442377878175440&q=global+warming&hl=en

http://www.youtube.com/watch?v=ov6GPTB4Tio&mode=related&search=

http://www.youtube.com/watch?v=3n31Y3Eeqic&mode=related&search=

http://www.youtube.com/watch?v=7FVZSUsT-Ws&mode=related&search=