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. Twenty five states are now part of the United States Climate Alliance; a collection of states that have committed to taking action that addresses the climate challenge and implement policies that advance the goals of the Paris Agreements, aiming to reduce greenhouse gas emissions by at least 26-28 percent below 2005 levels by 2025. Mills, along with governors from Illinois, Montana, Nevada, New Mexico and Pennsylvania, all joined this year. They are part of the increasing action seen across the states in clean energy, climate change and carbon reduction. This story takes a look at some of the 2019 developments in the states.