Paul Krugman’s Solar Delusions

Solar energy can solve global warming. That’s what Paul Krugman claims in his April 18 column in the New York Times, “Salvation Gets Cheap.”

Krugman extolled “the incredible recent decline in the cost of renewable energy, solar power in particular.” He used to dismiss the claim that renewable energy would be a major source of global energy “as hippie-dippy wishful thinking.” But now, he says, thanks to the falling price of renewable energy, the process of decarbonization can be accelerated and “drastic cuts in greenhouse gas emissions are now within fairly easy reach.”

Solar is getting cheaper. And solar capacity is growing rapidly. But Krugman is still wrong. Solar won’t result in “drastic cuts” in greenhouse-gas emissions for two simple reasons: scale and cost.

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