Thursday, January 31, 2013 CNN.com - Top Stories: What causes Beijing's hazardous smog? CNN.com - Top Stories CNN.com delivers up-to-the-minute news and information on the latest top stories, weather, entertainment, politics and more. What causes Beijing's hazardous smog? Jan 31st 2013, 21:40 CNN's Mari Ramos explains Beijing's hazardous smog is caused by more than just pollution. 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