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As an unlikely carbon tax policy fight emerges in the GOP-controlled Congress during an election year, several academic and think tank researchers are releasing joint studies finding that such a policy could significantly reduce greenhouse gases while having a relatively modest effect on the economy.

House science committee Republicans were forced to drop their planned markup of legislation redirecting the work of EPA's influential but controversial Integrated Risk Information System (IRIS) program after the House Energy and Commerce Committee won jurisdiction over the just-introduced measure, raising doubts about the legislation's future.

EPA has finalized its first round of revisions to its 2014 Resource Conservation and Recovery Act (RCRA) coal ash disposal rule, including new groundwater monitoring mandates and a delay of closure deadlines for some leaking facilities, but putting off decisions on a host of other proposed changes until a “subsequent” rulemaking.

Environmentalists are urging judges in three federal courts to rule against EPA’s efforts to dismiss before trial their separate but related lawsuits over former Administrator Scott Pruitt’s October 2017 policy barring agency grant recipients from serving on EPA advisory panels.

EPA is refusing to take sides in court on the merits of its 2015 Clean Water Act (CWA) jurisdiction rule, urging a federal judge to put challenges to the regulation on hold as it weighs a repeal but adding that if the suit does continue it will defend only the procedure the Obama administration used to craft its signature clean water policy.

Petrochemical and other industry representatives are reiterating their support for EPA's proposed rule barring the use of science where the underlying data and models are not publicly available but they are also calling for clarifications that would expand the rule's scope, limit EPA's ability to grant waivers, better protect trade secrets and more.

A federal health agency's recently released draft report recommending stricter risk values than EPA had adopted for two perfluorinated chemicals is already driving calls for tougher regulatory requirements, with a bipartisan group of House lawmakers urging EPA to reconsider its health advisory levels once the draft is finalized.