The SEC did a sensible thing on climate change. A right-wing campaign is trying to kill it.

As drought spreads and sea levels rise, the economic impacts of climate change will run in the trillions of dollars. The insurance firm Swiss Re projects climate disasters would cost the world as much as $23 trillion by 2050, bigger than the impact from the pandemic and the Great Recession of 2009 combined.

It’s reasonable business planning to account for all this foreseeable risk — just like planning for cyberattacks or business disruptions from a pandemic. Last year, for instance, the US had to spend $145 billion dealing with floods, fires, and other climate-related disasters.

Yet somehow, climate...