Increased immunity in weeds may threaten U.S. crops

Aired: 11/15/2014 | 0:08:09 | Clip
NewsHour Weekend traveled to Iowa to explore the widespread issue of herbicide-resistant and hard-to-control weeds. Millions of acres of farmland have been affected, rendering some fields unable to be farmed.The EPA recently approved a new Dow herbicide that the industry says could help the problem. Opponents have sued claiming it could possibly harm the environment and human health.