The Plowprint Report: https://www.worldwildlife.org/projects/plowprint-report
And summary news article:
America’s Great Plains are being plowed under at an alarming rate Nov 30 2016
Much attention has been given to the deforestation in the Amazon and the environmental impacts that go with it. But in 2014, the American Great Plains—an area stretching from Texas into Canada—actually lost more acreage of grasslands than Brazil lost to deforestation, the World Wildlife Fund (WWF) says. In fact, said Martha Kauffman, WWF’s managing director of the Northern Great Plains program, “America’s Great Plains are being plowed under at an alarming rate.”….