The Environmental Protection Agency blasted more than two dozen states' attempt to have the Supreme Court halt its landmark climate rules for power plants, saying the arguments they make will not hold up in a lower court, let alone the highest.

Under a Thursday deadline set by Chief Justice John Roberts, the agency filed its response to last week's motion by 29 states to stay the Obama administration's far-reaching climate rules, called the Clean Power Plan.

"The relief that applicants request would be extraordinary and unprecedented, and their applications should be denied," the EPA told Roberts in a response brief filed with the court.

It argues that the states' motion is untimely and should wait for the D.C. Circuit Court of Appeals to grant a decision on the merits of their arguments later this year.

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