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Coal industry groups are urging the Supreme Court to overturn a federal appeals court's decision that limited a Clean Water Act (CWA) “shield” against legal liability under a general permit for stormwater, arguing the ruling conflicts with another appellate decision and sets a precedent that would undermine certainty for dischargers and regulators alike.

EPA has sent for White House pre-publication review its long-awaited finding on whether aircraft greenhouse gas (GHG) emissions endanger public health and welfare, with environmentalists seeking an affirmative endangerment finding that would trigger a Clean Air Act mandate for the agency to write GHG rules for aircraft.

President Obama is vowing to oppose two pending House bills that proponents say would bolster “transparency” of EPA's science underpinning its rulemakings and input it receives from its scientific advisers, with the White House warning the bills would undermine advisers' independence and impede the rulemaking process.

The White House is threatening to veto two pending House bills that proponents say would bolster “transparency” of EPA's science underpinning its rulemakings and input it receives from its scientific advisers, with the White House warning the bills would undermine advisers' independence and impede the rulemaking process.

A Vermont city's challenge to an EPA-approved waterbody cleanup plan that limits the rate at which stormwater can flow into a stream is reviving the legal debate over whether the agency can use flow as a surrogate for reducing sediment and other runoff-borne pollution, following a 2013 district court ruling that found such controls violate the Clean Water Act (CWA).

Science advisors reviewing EPA's draft assessment of the human health risks of the sterilizing chemical ethylene oxide (EtO) are indicating in a first public draft of their review report that EPA should consider a "much more balanced and objective" approach to modeling the chemical's cancer risks, and urge the agency to present analysis showing unit risk estimates calculated from multiple models.