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California air regulators have unveiled a long-awaited proposal to set aggressive zero-emission vehicle (ZEV) sales mandates for new passenger vehicles that would ramp up requirements to reach 100 percent ZEV sales by 2035, likely bolstering calls for the Biden administration to set federal emissions standards that achieve such a goal.

Environmentalists are pressing the Department of Transportation’s (DOT) pipeline safety office to adopt “advanced leak detection” (ALD) methods for upcoming regulations to reduce methane emissions from gas pipelines, an approach that industry officials are cautiously supporting even as they raise cost concerns.

Sens. Jeanne Shaheen (D-NH) and Rob Portman (R-OH) are expected to reintroduce energy efficiency legislation within weeks to make another attempt at establishing energy savings targets for voluntary national model building codes, among other climate-friendly efforts, after the bid stalled in the last Congress.

As California officials weigh new post-model year 2025 vehicle emission standards, environmentalists are urging them to adopt measures that ensure all new cars, trucks and SUVs are zero-emitting by 2035, echoing similar advocacy aimed at the Biden administration, which recently took steps to restore the state’s power to craft such standards.

Researchers at the Massachusetts Institute of Technology (MIT) are urging the Federal Energy Regulatory Commission (FERC) to consider whether new rules are needed for pipelines transporting hydrogen, which is increasingly being viewed as an alternative to fossil fuels in the transition to a net-zero emissions economy.

Harvard researchers are detailing the adverse health impacts from burning biomass and other combustion fuels for power generation, findings that could bolster efforts by some agriculture industry groups who are asking EPA to exempt use of agriculture residues in non-combustion processes, such as bioplastics production, from greenhouse gas permitting.

A California state senator has been forced to scale back her legislation that aims to boost the use of “green hydrogen” as a zero-emissions fuel in the face of concerns from environmentalists and some Democratic lawmakers that it would allow some higher-carbon sources to meet the bill’s requirements.

An environmental group and a utility sector union are floating an “affordable” set of recommendations to support coal miners and workers at coal-fired power plants as the country transitions to low-carbon energy, policies that supporters hope could unlock broader political support for the Biden administration’s climate agenda.