http://news.yahoo.com/s/ap/20080624/ap_on_sc/sci_warming_scientist;_ylt=Ar8Vg75EZSfboc_n4KZIfJ1I2ocA
WASHINGTON - Exactly 20 years after warning America about global warming, a top NASA scientist said the situation has gotten so bad that the world's only hope is drastic action.
James Hansen...