Living on Earth: January 6, 2012

The GOP Presidential Race and the Environment / New Recommendations for Lead Levels in Children / Disposal of Fracking Wastewater Polluting PA Rivers / Tiger Sharks Dine on Migrating Birds / BirdNote® Bohemian Waxwings / A Green Ocean / The Rap Guide to Evolution / Earthear Learn more about your ad choices. Visit megaphone.fm/adchoices