Increased corn production in the mid-West United States, for example, threatens marine life in the Gulf of Mexico, where a dead zone more than 20 000 km2 has been created by the high nutrient inputs from the Mississippi.
Cuir i gcás táirgeadh méadaithe an arbhair i meán-Iarthar SAM, a chuireann i mbaol na beartha mara i Murascaill Mheicsiceo, mar ar cruthaíodh crios marbh ní ba mhó ná 20 000 km2 ag na hionchuir ardchothaithigh ón Mississippi.