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Wisconsin is one of 22 states suing the federal Environmental Protection Agency over its efforts to roll back Obama-era climate protections.

Democratic Attorney General Josh Kaul on Tuesday signed onto the petition for review of the Trump administration’s Affordable Clean Energy plan, which eased carbon emission limits on fossil-fuel power plants that were proposed — but never implemented — under the Clean Power Plan.

“Climate change is not only real; it’s a crisis,” Kaul said in a news release announcing the suit.

“We’re only beginning to see its effects, including severe flooding and extreme temperatures. We can’t afford to wait for 20 years or a decade to take meaningful action. We need to step up now and to start responding to the climate crisis like our kids’ future depends on it — because it does.”

Minnesota, Michigan and Illinois were among the other states involved in the suit, filed Tuesday in the U.S. Court of Appeals for the District of Columbia. The cities of Boulder, Chicago, Los Angeles, New York, Philadelphia, South Miami and the District of Columbia joined in the suit.