With concerns about the possible health and environmental effects of oil dispersants in the Deepwater Horizon disaster still fresh in mind, scientists have created a new dispersant made from edible ingredients that both breaks up oil slicks and keeps oil from sticking to the feathers of birds (NOTE: Subscribers can still listen to these shows) And With 1.3 billion tons of food trashed, dumped in landfills and otherwise wasted around the world every year, other scientists are studying ways to change food waste into a key ingredient for making plastics, laundry detergread more