Every day, we use materials from the earth without thinking, for free. But what if we had to pay for their true value: would it make us more careful about what we use and what we waste? Think of Pavan Sukhdev as nature’s banker — assessing the value of the Earth’s assets. Eye-opening charts will make you think differently about the cost of air, water, trees … (Recorded at TEDGlobal 2011, July 2011, in Edinburgh, Scotland. Duration: 16:31.)
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