Redemption for NASA scientist who made bold global-warming call 30 years ago

Rachel Koning Beals
Redemption for NASA scientist who made bold global-warming call 30 years ago

James Hansen, with a warning to Congress in the 1980s, is considered to be among the first climatologists to sound the alarm on man-made global warming. This week, a new team of scientists backs his findings, and those of most climate models.