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This is Scientific American 60-Second Earth. I'm David Biello.Your minute begins now.

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Hot, arid regions aren't the kind of place people usually farm.

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But a team of German scientists wants to change that in a bid to help cool down global warming.

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The idea is simple: plant the weedy shrub known as jatropha in hot, dry lands around the globe.

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Based on data from existing plantations, each hectare of jatropha would capture 25 metric tons of CO2 per year while growing.

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Given roughly 1 billion hectares of such land available for such plantations,

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that's 25 billion metric tons removed from the air,

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or enough to offset the annual CO2 pollution of China, the U.S.and the E.U.combined.

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And it could be kept up for 20 years or so.

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The research appears in the journal Earth System Dynamics.

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There's several catches of course.

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The poisonous jatropha would still need water to grow on this marginal land,

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And land-grabbed jatropha plantations have had bad results growing the oil-seed crop for biofuels.

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Regardless, the German scientists would like to set up a pilot plantation to test the scheme.

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Given the scale of the climate challenge, a few more shrubs can't hurt, and they just might help.

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Your minute is up, for Scientific American 60-Second Earth. I'm David Biello,

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