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David Keith hopes we don’t have to use his ideas to reverse global warming

Are you sitting down?

IN JUNE, climate scientist David Keith and his neighbors in Calgary, Alberta, were ripping carpets and drywall from their flooded homes — again. In 2005, a “flood of the century” had shattered city records. The 2013 flood was even bigger and forced 100,000 residents to flee to higher ground.

To Keith, the city’s second 100-year flood in less than a decade seemed a little ironic. Calgary is the nerve center of Canada’s oil industry, including tar-sands giant TransCanada, developers of the Keystone XL pipeline, and home to plenty of folks who don’t seem to worry much about climate change. Maybe, Keith mused in an e-mail from the flood zone, this latest example of extreme weather would be “a bit of a reality check.”

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