Grim Climate Change News: Trees Dying, Seasons Changing, Harvests Dropping

More grim news about climate change in the science journalist this week. An article published in the journal Science suggests warmer summers are driving up the rate at which trees die in western North America's old-growth forests, doubling it every few decades. Research published this week in Nature says seasonal changes are happening almost two days earlier than they used to. And a third study says climate change is hurting crop yields—something that could eventually leave half the world starving. Africa Jones reports.

Click here for the full newscast for Friday, January 23, 2009