Farmer Seth Watkins (left) and agronomist Matt Liebman stand amid native prairie grasses near Des Moines, Iowa. The conservation strip is used to stop soil erosion. John Ydstie/NPR hide caption

itoggle caption John Ydstie/NPR

Former Treasury Secretary Henry Paulson says he hopes a new study can influence the business community by applying the science of risk management. iStockphoto hide caption

itoggle caption iStockphoto