Living on Earth: July 13, 2012
b'Keeping Emissions Down in California / Cellulosic Fuel Update / Science Note/Bat Aerodynamics / Chemicals and Health / Bare Shoulders: Herbicide Along the Highway / BirdNote\\xae What Do Birds Smell? / Arctic Explorers / Earth Ear\\nLearn more about your ad choices. Visit megaphone.fm/adchoices'