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Higher CO{-2} May Imperil Grasslands 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. The study paints a harsh picture of what grazing lands could look like in 2100, when some estimates project carbon dioxide levels will be double today's.

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Higher CO{-2} May Imperil Grasslands

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.

The study paints a harsh picture of what grazing lands could look like in 2100, when some estimates project carbon dioxide levels will be double today's.