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U.S. EPA's implementation of the Clean Power Plan is on hold while the courts review the rule.

Twenty-seven states and major business groups are challenging the Clean Power Plan in court. Many suing states announced shortly after the Supreme Court decided in February 2016 to stay the rule that they would halt planning activities. Others are charging ahead with their work. While the rule is stayed, EPA cannot require any action from states.

EPA published the final Clean Power Plan on Aug. 3, 2015, significantly revising an earlier draft version of the rule to respond to concerns from states, industry groups and other stakeholders.

The regulation gives states two more years to submit plans and start making carbon cuts. It contains "trading-ready" elements for states that want to assign targets for electricity generators and allow them to purchase credits or allowances to meet goals.

EPA has proposed options for a federal plan to impose on states that do not submit adequate blueprints for reducing carbon emissions by required amounts. The agency also hopes to finalize model trading rules.

To learn more about how the rule works, read our summary of the Clean Power Plan.

To read more about Clean Power Plan lawsuits, see our overview of legal challenges.

To read more about grid issues, see our overview of reliability concerns and assurance mechanisms.

To see research and other resources prepared by consultants and trade groups, visit our Power Plan Toolbox.

Last updated on September 19, 2016 at 2:46 PM

For questions or comments about E&E’s Power Plan Hub or related stories, please email staff reporters Emily Holden and Rod Kuckro at

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