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Midwestern industry groups and states are pushing back hard against New York’s petition for EPA to regulate ozone pollution from hundreds of power plants and other facilities in upwind states, fearing it would set a precedent that could allow regulation of sources on a scale previously unseen and in sectors previously unaffected by such petitions.

The Democratic attorneys general (AGs) of New York and New Jersey, along with New York City, are indicating their willingness to sue EPA if the agency follows through on plans to deny the Empire State’s landmark Clean Air Act section 126 petition seeking regulation of hundreds of upwind pollution sources, opening the door to a legal battle on the reach of the agency’s power.

A federal appeals court has rejected environmentalists’ lawsuit attempting to force EPA to set first-time Superfund financial assurance rules for the hardrock mining sector after the agency declined to do so, with the court applying the Chevron deference standard to uphold EPA’s decision.

A long-stayed constitutional challenge to California rules requiring cancer warnings for glyphosate pesticide products could be poised to proceed following federal appellate rulings on similar issues that the state was waiting on when it asked the court to delay imposing a preliminary injunction on its labeling rule in 2018.

As large swaths of the country face a record-breaking heat wave, environmentalists are warning that unchecked climate change will cause extreme and deadly heat across the country and bring “unprecedented” health risks, underscoring their calls for deep cuts in carbon emissions as well as to take major steps to adapt to the threat.

EPA is formally denying environmentalists’ objections to the Trump administration’s decision to overturn an Obama EPA ban on agricultural uses of the widely-used and controversial pesticide chlorpyrifos, meeting a court-ordered deadline for a final decision that clears the way for a legal challenge on the merits of the reversal.

Academic and other researchers are questioning major assumptions in EPA’s final Affordable Clean Energy (ACE) rule to limit power sector greenhouse gas emissions, finding that the rule is likely to have greater adverse air quality and health effects than EPA projected, largely due to emission “rebound” effects that the agency downplays.