New York Attorney General Eric Schneiderman said Monday he would sue the Trump administration for repealing the Obama-era Clean Power Plan, a major regulation restricting greenhouse gas emissions from coal plants.

"By seeking to repeal the Clean Power Plan, especially without any credible commitment to replacing it, the Trump administration's campaign of climate change denial continues, once again putting industry special interests ahead of New Yorkers' and all Americans' safety, health and the environment," the Democrat said.

"If and when the Trump administration finalizes this repeal, I will sue to protect New Yorkers and out a stop to the Trump administration's irresponsible and illegal efforts to turn back the clock on public health."

Environmental Protection Agency Administrator Scott Pruitt announced Monday he will sign a proposed rule on Tuesday to repeal the Clean Power Plan, which requires states to reduce their greenhouse gas emissions one-third by 2030.

"The war on coal is over," Pruitt said at an event in eastern Kentucky with Senate Majority Leader Mitch McConnell, R-Ky.

The Clean Power Plan has not been implemented. The Supreme Court froze the plan in February 2016 as it worked its way through the courts. The D.C. Circuit Court of Appeals heard oral arguments from more than two dozen states and over 100 industry groups challenging the Obama-era rules in September 2016, but has not ruled on the case.

Environmental groups and several states anticipating the Trump administration's repeal of the plan have said they plan to challenge the action in federal courts.

Schneiderman is a leading opponent of the Trump administration's policies and has instigated legal challenges related to the president's immigration and environmental actions.

Schneiderman is also suing the Trump administration for delaying implementation of clean air standards related to smog.