worse-case, highest-carbon-emission scenario.” (The Intergovernmental Panel on Climate Change is the U.N. body that assesses climate change.) How do we weigh the risks of underreacting to climate change against the risks of overreacting to it? While he’s not an expert on climate change, he has spent decades thinking deeply about every manner of risk. That’s particularly true if climate change is akin to cancer — manageable or curable in its earlier stages, disastrous in its later ones. Maybe, I realized, in assessing my newfound concerns about climate change, my long-held beliefs might provide a solution — look to the market.

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