The shrinking cost of solar energy: By the numbers

As harnessing the sun's energy becomes cheaper and more efficient, some analysts believe solar will overtake fossil fuels in a matter of decades

It reportedly takes the sun only 14.5 seconds to provide as much energy to Earth as humanity uses in a day.
(Image credit: Michael DeYoung/Blend Images/Corbis)

According to Moore's Law, the price of computing power is slashed in half every two years — which helps explain why personal computers become outdated so quickly. But now, as Paul Krugman at The New York Times notes, the solar energy industry is experiencing a similar trend. The price of producing solar power continues to fall — thanks to technological improvements and heavy subsidies in countries like China — and this onetime punchline of an energy sector continues to expand. Will solar power eventually overtake oil as Earth's primary energy source? Perhaps. In the meantime, a look at the shrinking cost of solar energy, by the numbers:

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