December 2011

Solar-panel-area-to-supply-the-world

It’s a calculation that can be done on the back of an envelope. Gerhard Knies a German particle physicist was the first to estimate how much was required to meet humanity’s demand for electricity. In 1986, in direct response to the Chernobyl nuclear accident, he scribbled down some figures and arrived at the following remarkable conclusion: in just six hours, the world’s deserts receive more energy from the sun than