Environmental groups deliver more than 35,000 petitions to Gov. Bruce Rauner's office asking him to support the federal plan to cut carbon emissions.
The Clean Power Plan requires states to come with their own plans to cut carbon emissions levels at power plants by more than 30 percent by 2030.
The petitions asking for Rauner to back the plan came from all across the state, including coal-rich southern Illinois, according to Will Kenworthy, vice president of Midwest operations for Microgrid Energy.
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"Every part of our state can benefit from clean jobs," Kenworthy state. "This is not Chicago versus Carbondale, this is Chicago and Carbondale, and Belleville and Edwardsville and Springfield and Peoria."
Environmental groups say Rauner has to act quickly, as states have to submit their initial plans on how to meet the reduced emissions standards to the U.S. Environmental Protection Agency by September 2016.
Rauner spokeswoman Catherine Kelly said "The administration continues to review the mandates of the Clean Power Plan, and we will continue to analyze the costs and impacts of all possible compliance options so that we can fully evaluate all of the state’s options."
Earlier this month, Illinois Attorney General Lisa Madigan came out in support of the plan, filing a motion to intervene to defend the rule from lawsuits filed by other states. 17 other state's attorneys general have taken similar actions.