They Defied Trump on Climate Change. Now, It’s Their Moment of Truth.

A big test of that antidote will be whether America’s states, cities and companies put forward meaningful new steps to cut emissions — and whether that, in turn, helps to persuade local leaders in other countries to ratchet up their own efforts on climate change.

“There’s a real push to make sure that this We Are Still In movement becomes something more than just a symbolic exercise,” said Gwynne Taraska, a senior fellow at Climate Advisers, a consulting firm. “This is an opportunity for them to cement their diplomatic relevance.”

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