What the hell is the DC Metro’s “climate change will increase shark bites” ad talking about? An investigation

Ever since I moved to Washington, DC last summer, I’ve been fascinated by an ad campaign for the DC Metro. The premise of the campaign is simple: taking public transit reduces your carbon footprint compared with driving yourself. It highlights various negative consequences of climate change, and points out how riding the Metro can help fight them.

Many of these ads highlight well-known consequences of climate change:

Photos by David Shiffman

Others highlight less well-known consequences of climate change, but are still on solid scientific ground:

But one ad in particular has been perplexing me for months:

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