RACHEL MARTIN, HOST: President Trump is expected to roll back regulations today on coal-fired power plants. It's a reversal of Obama-era efforts to slow climate change and promote clean energy. And it gives climate-conscious states, like Colorado, a lot to think about. The state's largest utility has big plans, including a future defined by less fossil fuels. That could mean changes at Xcel Energy's coal plant in the small blue-collar town of Pueblo in south central Colorado. Grace Hood from Colorado Public Radio has more on a city at the crossroads. GRACE HOOD, BYLINE: Pueblo's skyline is defined by the three smokestacks at the Comanche coal-fired electricity plant, the largest owned by Xcel in the state. For the last 15 years, that's been the destination for Dave McKenzie's morning commute. DAVE MCKENZIE: We're very well-paid for what we do, but we work in a dangerous situation.