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Environmentalists are encouraging EPA to issue several major regulations related to hydraulic fracturing ahead of the 2016 presidential election, aiming to have President Obama sign off on controversial measures a GOP president might oppose such as methane, effluent and toxics disclosure rules for fracking.

The U.S. Court of Appeals for the 10th Circuit has rejected environmentalists' suit challenging EPA's approval of several western states' use of a sulfur dioxide (SO2) emissions trading program to satisfy regional haze air plan pollution control mandates, boosting states' authority to use cap-and-trade to meet their haze program requirements.

EPA's planned information collection rule for nanomaterials is expected to include a first-time definition of the substances for regulatory purposes, industry sources say, criteria that will influence the scope of this and future rules governing the substances, though environmentalists, citing extended delay, question whether the rule will ever be issued.

Proponents of EPA's Cross-State Air Pollution Rule (CSAPR) are downplaying the harms to states or utilities if the U.S. Court of Appeals for the District of Columbia Circuit rules to lift a stay on implementing the rule, saying that either immediate reinstatement of the rule or a delayed implementation schedule would impose minimal harms.

Appellate judges will hear oral arguments later this week in environmentalists' suit aiming to force EPA to issue Toxic Substances Control Act (TSCA) regulation of lead bullets, with advocates arguing new data on lead's risks to wildlife justify the rule even as the agency reiterates its claim that it lacks authority to craft the regulation.

A federal appellate court has rejected a request by West Virginia and other states to expedite consideration of their novel lawsuit against EPA's proposed greenhouse gas (GHG) standards for existing power plants and is asking parties to submit briefs within the next month on whether the court has jurisdiction over the case.