Industry groups have sent a letter to EPA chief Gina McCarthy warning that the carbon rules for existing power plants are “not workable,” The Hill reports.

The Partnership for a Better Energy Future, which represents 140 organizations, including the Chamber of Commerce, National Mining Association, American Petroleum Institute, American Fuel and Petrochemical Manufacturers and more, wants the EPA to extend the public comment period for the new climate rules and change the proposed regulation, which would cut carbon emissions from existing power plants by 30 percent by 2030 below 2005 levels.

“But assuming all things stay as they are, then we’ll see some action in the courts,” Jay Timmons, CEO of the National Association of Manufacturers, told The Hill.

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