Over the past 15 years, the United States has undergone a significant transition away from coal-fired power plants. This transition is being driven by several factors, including environmental regulations, competition from natural gas, and the declining cost of renewable energy. As coal-fired power plants are retired, there is a need for reliable and affordable zero-emission power replacements. To date, a large fraction of coal’s displacement has come from natural gas. Although it is cleaner than coal, natural gas is still a fossil fuel and…