Scary prediction from five years ago: CO2 may cause a "tsunami of grass" to engulf Minnesota

Pawlenty and Steger kick off climate talks in Ely

"With a doubling of [carbon dioxide], our forests will shift 200 to 400 miles northward," University of Minnesota forest ecologist Lee Frelich told about 250 people who crowded into the auditorium at Vermilion Community College. "There would be a tsunami of grass from the west. Minnesota would end up without much forest at all."