Sunday, August 5, 2012 CNN.com - Top Stories: Climate skeptic changes tune CNN.com - Top Stories CNN.com delivers up-to-the-minute news and information on the latest top stories, weather, entertainment, politics and more. Climate skeptic changes tune Aug 6th 2012, 04:37 Former skeptic Richard Muller now says global warming is real and that human output of greenhouse gases is to blame. You are receiving this email because you subscribed to this feed at blogtrottr.com. If you no longer wish to receive these emails, you can unsubscribe from this feed, or manage all your subscriptions Tweet