The Environmental Protection Agency is holding a second day of hearings in Denver on its new rules for cutting power-plant pollution.
Utility and coal company representatives say the rules were unclear and unreasonable, and warn that jobs and communities could suffer. Renewable-energy executives say their industry will bring jobs, profits and innovations.
States would have wide latitude in choosing how to meet the administration's goals. That leaves an uncertain fate for some of the West's large coal-fired power plants.
Wednesday's hearing runs until 8 p.m.
The EPA is also holding hearings on the rules in Atlanta, Pittsburgh and Washington this week.