David Keith, a climate scientist at Harvard University, and author of  A Case for Climate Engineering, is interviewed at re/code.

There’s no question it reduces the global average temperatures; even the people who hate it agree you could reduce average global temperatures. The question is: How does it do on a regional basis?

By far the single most important thing to look at on a region-by-region basis is the impact on rainfall and temperature.

And the answer is, it works a lot better than I expected. It’s really stunning.

A lot of us thought that, in fact, geoengineering would do a lousy job on a regional basis — and there’s lots of talk on the inequalities — but in fact, when you actually look at the climate models, the results show they’re strikingly even.

Now, it’s not perfect and there are some things it won’t do. Turning down the sun does nothing for ocean acidification.

But it looks like it can cut, like, 80 percent of the total variation in climate, which is really stunning.

In some ways we should be singing it from the rooftops. But the scientific community is so painfully scared of talking about it. These papers come out, and people find the best ways to say, well, it sort of works, but it’s really awful.

The fact is, people really appear to have found a way to significantly reduce the climate risk — by more than half, which is a big deal.

Hat tip: Mark Frazier.


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