MO HB2140

Requires the Missouri Air Conservation Commission to establish separate carbon dioxide emissions standards for existing coal-fired and natural gas-fired electric generating units, adjusted on a case-by-case basis.

Standards for coal-fired units must be based on best demonstrated emission reduction systems, reasonable emissions reductions at each unit, and efficiency measures that reduce emissions without switching fuels, co-firing, or limiting unit utilization.

Standards for gas-fired units must apply the same criteria as coal units but allow efficiency measures without switching from natural gas to other lower-carbon fuels or limiting utilization.

Commission must consider adopting less stringent standards or longer compliance schedules than federal rules based on consumer impacts, unreasonable costs, implementation difficulties, unit remaining useful life, economic impacts of closure, and other unit-specific factors.

Commission may implement standards through flexible regulatory mechanisms including emissions averaging, emissions trading, or other alternative measures, and cannot submit plans to the EPA that conflict with these provisions.