MPR: Fertilizing crops in the U.S. Corn Belt emits a potent greenhouse gas, and a new University of Minnesota study shows officials have been underestimating those emissions by as much as 40 percent.
The study, published Monday in the Proceedings of the National Academy of Sciences, looked at nitrous oxide, a greenhouse gas about 300 times more potent than carbon dioxide and 12 times more potent than methane.
Nitrous oxide gas is emitted from rivers and streams that receive agricultural runoff,...