Other participants in the alliance include California, Washington state, Massachusetts and New York.
The group is intent on ensuring the U.S. still acts to reduce greenhouse gases despite President Donald Trump's withdrawal from the accord last week.
“Connecticut has been a national leader in combatting climate change and we have no plans of slowing down our efforts,” Malloy said. “In the absence of leadership from the White House in addressing climate change, it is incumbent upon the states to take action in order to protect their residents.
Remaining committed to the Paris Climate Agreement "is the right thing to do for not only the future of our state, but for the future of our planet," he said.
Stamford Mayor David Martin blasted Trump's decision and vowed that the city will continue to work to reduce its carbon footprint.
“By turning our back on the warming of the Earth, we are leaving future generations more at risk for catastrophic storms and events that could have been prevented by doing some hard work now.
"Through the work of the Energy Improvement District, right now we are installing LED lights in almost all of the public schools and the Government Center," Martin said. "Not only will this save money and provide better lighting to our students and staff, it drastically reduces our carbon footprint. It’s a win no matter how you look at it."
Stamford will continue to "recognize the spirit of the Paris Climate Agreement," he said.
Hartford Mayor Luke Bronin lit Hartford City Hall in green Friday night to underline the city's efforts to conserve energy, increase the number of green jobs, and support the quality of neighborhood life for residents.
“In virtually every other country in the world, the debate is about how to confront climate change responsibly – not the absurd idea that it’s a ‘hoax’ created by China," Bronin said. "Not only do we have a moral responsibility to reduce carbon emissions, we should also be seizing the opportunity to build a robust green jobs economy by investing clean energy.”
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