A line of fire turns brown grass into black earth. Dan Charles/NPR hide caption

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A tall, rubbery weed with golden flowers Dalmatian toadflax is encroaching on grasslands in 32 U.S. states. pverdonk/Flickr hide caption

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Fox Ranch, outside Yuma County, Colo., is a 14,000-acre nature preserve and working commercial cattle ranch. The ranch is used by the Nature Conservancy to put into practice its panned grazing technique. Luke Runyon/Harvest Public Media hide caption

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Cattle and zebra share a meal in a pasture in Kenya. Ryan Lee Sensenig/Science hide caption

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