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What Local Climate Actions Would Have the Greatest Impact

In light of even more dire news about our warming planet, leading thinkers tell us the one thing cities and states could do to cut emissions significantly—and fast.
The slogan "No Plan B" is projected on the Eiffel Tower as part of the World Climate Change Conference in 2015 in Paris.
The slogan "No Plan B" is projected on the Eiffel Tower as part of the World Climate Change Conference in 2015 in Paris.Charles Platiau/Reuters

A landmark report released by the U.N. last week has laid out the stakes of a warming planet more starkly than ever. Warming of just 1.5 degrees Celsius could bring on the most severe consequences of climate change, according to the Intergovernmental Panel on Climate Change (IPCC) report.

Many cities and states are leading the public charge to address this, particularly in the U.S. after President Donald Trump pulled out of the Paris climate accord. But it’s not yet clear what their tangible and collective impact has been.