The mayors who previously pledged to ignore President Donald Trump’s climate change policies have upped their commitment after he announced his intent to withdraw the U.S. from the Paris climate accord: At least 180 cities are adopting the historic agreement themselves.
The U.S. mayors are joined by dozens of international mayors who have made their own commitments to the climate agreement meant to limit the rise of global average temperatures to 2.0 degrees Celsius. (Although the cities cannot technically join the agreement, they can informally agree to its guidelines.
In the Climate Mayors statement, the mayors claim that not only will their cities individually adopt the Paris accord, they will work as a group to push for even stronger climate action. “We will intensify efforts to meet each of our cities’ current climate goals, push for new action to meet the 1.5 degrees Celsius target, and work together to create the 21st-century clean energy economy,” reads the statement. “The world cannot wait—and neither will we.”
See https://www.curbed.com/2017/6/1/15726376/paris-accord-climate-change-mayors-trump 
180 mayors adopt Paris climate accord after U.S. pulls out
A growing number of mayors pledge to uphold the global climate commitment after President Donald Trump announced his intent to withdraw from the Paris agreement.