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A short history of nearly everythingAccording to computer simulations, even a modest dilution of the oceanБЂ™s salt content-from increased melting of the Greenland ice sheet, for instance-could disrupt the cycle disastrously. The seas do one other great favor for us. They soak up tremendous volumes of carbon and provide a means for it to be safely locked away. One of the oddities of our solar system is that the Sun burns about 25 percent more brightly now than when the solar system was young. This should have resulted in a much warmer Earth. Indeed, as the English geologist Aubrey Manning has put it, БЂњThis colossal change should have had an absolutely catastrophic effect on the Earth and yet it appears that our world has hardly been affected.БЂ«So what keeps the world stable and cool? Life does. Trillions upon trillions of tiny marine organisms that most of us have never heard of-foraminiferans and coccoliths and calcareous algae-capture atmospheric carbon, in the form of carbon dioxide, when it falls as rain and use it (in combination with other things) to make their tiny shells ...» |
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