New research shows that one-third of yearly nitrogen runoff from Midwest farms to the Gulf of Mexico occurs during a few heavy rainstorms. New fertilizing schedules could reduce nitrogen pollution.
A new look at detailed data about Civil War skirmishes along the Mississippi River reveals another key to the Union's victory.
At a time when storms are becoming more frequent and severe, relying on levees for flood control can create as many problems as it solves.
Scientists are predicting major algae blooms in Lake Erie and large dead zones in the Chesapeake Bay and Gulf of Mexico this summer. Nutrient pollution from industrial corn farming is a major driver.