Over 150 heads of state met in Paris this week, the largest group of leaders ever to attend a UN event in a single day, to address global climate change and the need for policies and technologies that will set the world on the path to a low-carbon, climate resilient future.

When Gov. Janet Mills addressed the United Nations General Assembly on Sept. 23, it was the first time a sitting governor of Maine has been asked to address the body. She had been invited as part of her participation in the UN Climate Action Summit 2019, and has made tackling climate change and embracing renewable energy key priorities of her administration. She is not the only governor stepping into the role where the federal government has backed out.

Leaders within the largest city in the United States, and one of the most influential in the world, recognize the daunting challenges resulting from New York City’s vulnerability to climate change—evidenced already in violent storms, flooding, and rising sea levels—as well as the economic opportunity that comes in combating the negative impacts of that change and reducing the city’s contributions to further temperature rise.