We Have Made Our Planet. Now We Must Try To Live on It

January 5, 2015 2:56 PM

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Ever since humans emerged onto the wild savannah, we have modified our environment -- burning our way through forest, cutting necklaces of rice into mountains, shifting rivers, hunting to disappearance the biggest animals and taming many others, digging rock and mud to grow magnificent cities where living structures once stood.

But the changes humans have made in recent decades have been on such a scale that they have altered our world beyond anything it has experienced in its 4.6 billion-year history. Our influence is no longer confined to a local area or even a region -- it's global, and so profound, it is pushing the pl...

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