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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 .The grasshopper is a carefree creature…according to Aesop's fables.
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3 .But in real life, grasshoppers can have a lot to worry about.
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4 .For example, grasshoppers get quite anxious when they know there's a deadly spider about, and it puts them off their food.
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5 .Since their food is grass, nervous grasshoppers leave more grass intact to perform photosynthesis,
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6 .turning sunlight and carbon dioxide into plant food.
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7 .More CO2 in these grasses and their roots means less CO2 in the air.
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8 .That's according to a new paper published in Proceedings of the National Academy of Sciences.
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9 .Yale researchers tracked CO2 as it cycled through Plexiglass cages containing just grass, grass and grasshoppers, or grass, grasshoppers and spiders.
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10 .Grasses stored 1.4 times as much carbon with spiders about than when grasshoppers were allowed to roam unmolested.
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11 .That's even better than when there were no grasshoppers at all because nervous grasshopper grazing did little damage but spurred greener growth.
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12 .In other words, spiders protect the climate, just by being spiders and scaring grasshoppers.
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13 .Similar results may also prove true in ecosystems with larger predators, whether wolves and caribou or lions and zebras.
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14 .Keeping predators around may be another way to combat climate change.
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15 .Your minute is up, for Scientific American 60-Second Earth. I'm David Biello.
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