Calentamiento Global.
Tema muy interesante.
http://www.youtube.com/watch?v=S3rrNccNaoIhttp://www.youtube.com/watch?v=lzf8yN1wo3o&feature=fvwp&NR=1
http://www.youtube.com/watch?v=QD-18YqEPVM&NR=1&feature=endscreen
http://www.youtube.com/watch?v=gqzmQjN3EXg&feature=related
http://www.youtube.com/watch?v=nqIDpvEM6go&feature=fvwrel
http://www.youtube.com/watch?v=JwWyA2GnvzQ&feature=fvwrel
http://www.youtube.com/watch?v=93nPScaYvKc&feature=relmfu
http://www.youtube.com/watch?v=Mn4CbtoC_uo&feature=fvwrel
http://www.youtube.com/watch?v=P4PkR9HjJl0&feature=relmfu
http://www.youtube.com/watch?v=Vv1862QtvfE&feature=fvwrel
http://www.youtube.com/watch?v=Q3v38XPzgX4&feature=relmfu
http://www.youtube.com/watch?v=jt7bTQW3D2s&feature=fvwrel
http://www.youtube.com/watch?v=2mJRdDNEZSY&feature=fvwrel
Alberto Ortoll