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1 .This is Scientific American 60-Second Earth. I'm David Biello.Your minute begins now.
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2 .Hot, arid regions aren't the kind of place people usually farm.
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3 .But a team of German scientists wants to change that in a bid to help cool down global warming.
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4 .The idea is simple: plant the weedy shrub known as jatropha in hot, dry lands around the globe.
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5 .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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6 .Given roughly 1 billion hectares of such land available for such plantations,
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7 .that's 25 billion metric tons removed from the air,
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8 .or enough to offset the annual CO2 pollution of China, the U.S.and the E.U.combined.
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9 .And it could be kept up for 20 years or so.
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10 .The research appears in the journal Earth System Dynamics.
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11 .There's several catches of course.
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12 .The poisonous jatropha would still need water to grow on this marginal land,
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13 .And land-grabbed jatropha plantations have had bad results growing the oil-seed crop for biofuels.
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14 .Regardless, the German scientists would like to set up a pilot plantation to test the scheme.
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15 .Given the scale of the climate challenge, a few more shrubs can't hurt, and they just might help.
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16 .Your minute is up, for Scientific American 60-Second Earth. I'm David Biello,
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