The Investment Case for Climate Action

In 2006, Nicholas Stern’s landmark review for the UK government framed climate change as a stark choice between the benefits of early action and the catastrophic costs of doing nothing. Twenty years later, Stern has revisited that argument in a new book, The Growth Story of the 21st Century, and his central claim has shifted in a revealing way. The core insight from the original review still holds—greenhouse gas emissions remain “the biggest market failure the world has ever seen”—but Stern now argues that the framing itself was incomplete. The real story, he says, is not about costs versus benefits at all. It is about investment.

Why the language shifted from cost to investment

Stern explains that two things have happened since 2006 that fundamentally changed the economics. The science has gotten worse—temperatures are rising faster than models predicted, tipping points are arriving sooner, and the consequences of any given temperature increase are more severe than previously understood. But the technology has gotten much better, and much faster, than anyone expected.