Higher CO{-2} May Imperil Grasslands
Scientists warn of dire consequences for grazing areas
http://www.commondreams.org/archive/2007/08/28/3461/
by Alan Zarembo
Rising levels of carbon dioxide in the atmosphere might be contributing to the conversion of the world’s grasslands - critical for livestock grazing - into a landscape of useless woody shrubs, according to a study released Monday.
By artificially doubling carbon dioxide levels over enclosed sections of the Colorado prairie, researchers created a dramatic rise in Artemisia frigida, commonly known as fringed sage. 0828 03