In a joint text distributed to media outlets worldwide and posted online, the "C40" mayors "of the world's great cities" urged leaders from the Group of 20 "on behalf of the hundreds of millions of citizens that we represent.to deliver on your commitments to tackle climate change, one of the world's most pressing issues".
President Donald Trump's pullout from the Paris climate accord has triggered a bipartisan push from U.S. mayors to stick to the emissions cuts Washington had pledged to hit, a USA official said Tuesday.
"President Trump's disappointing decision to withdraw from the agreement will actually have the opposite effect in terms of execution", Reed told a meeting of mayors from Asia, Africa, Europe, South America and North America in Brussels.
Special Envoy of the United Nations for Cities and Climate Change, former New York Mayor Michael Bloomberg (R) is welcomed by European Commission President Jean-Claude Juncker at the European Commission in Brussels on June 27, 2017.
"The Trump administration had better watch out for U.S. cities", Robertson said.
With almost 140 members, Metropolis, a World Association of the Major Metropolises, is the global network of major cities and metropolitan areas, which serves as the hub and platform for metropolises to connect, share experiences and mobilize on a wide range of local and global issues.
"They're on the rise and I think will prevail in the end at turning the tide and making sure the USA is a climate leader", he told the gathering.
Trump's decision to pull the USA out of the Paris climate deal was lambasted by global and domestic leaders, including German Chancellor Angela Merkel and Tesla CEO Elon Musk.
But he said cities can do enough to keep the ball rolling until the arrival of a new USA president committed to the Paris agreement.
The issues include gun violence, safeguarding local government funds, dealing with cuts under President Donald Trump's policies and climate change.
Furthermore, Member States will work closely with non-state actors in the pursuit of keeping the increase in global average temperature to well below 2°C above pre-industrial levels. The US ranks just behind China in greenhouse gas emissions.