The Trump administration on Tuesday unveiled its proposal to replace the Obama administration’s signature climate initiative, the Clean Power Plan, weakening rules designed to limit emissions from coal-fired power plants.

The Clean Power Plan was designed to mitigate the worst effects of climate change and assigned each state emission reduction targets to phase in through 2030. Pennsylvania would have been required to reduce its carbon emissions by about 33 percent.

In a conference call with reporters Tuesday, Acting EPA Administrator Andrew Wheeler said the new Affordable Clean Energy (ACE) proposal “respects the rule of law” and that the Obama administration’s plan overstepped the EPA’s authority under the Clean Air Act.

More than two dozen states and local governments have said they will sue to block the replacement of the Clean Power Plan.

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This story is produced in partnership with StateImpact Pennsylvania, a collaboration among The Allegheny Front, WESA, WITF and WHYY to cover the commonwealth's energy economy.