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EPA, CARB escalate climate change war of words in Capitol Hill showdown

Green Car Reports

The EPA and California Air Resources Board have moved slowly in the past year, failing to reach a consensus on key issues between the federal department's proposals to roll back emissions-based fuel economy standards and the state's decades-old ability to set their own.

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Tighter EPA emissions rules for big trucks don’t mandate EVs

Baua Electric

The EPA last week announced stricter emissions standards for heavy-duty commercial vehicles, such as trucks and buses, for model years 2027 to 2032. By addressing greenhouse-gas emissions, these rules complement a December 2022 rule from the EPA that addresses smog- and soot-forming emissions from heavy-duty vehicles.

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Georgia Tech study projects potential mixed impacts of climate change policies on air quality

Green Car Congress

They used the EPA US 9-region national database (EPAUS9r) with the MARKet Allocation (MARKAL) energy system model to develop emissions scenarios and spectral nudging to downscale global climate to the regional scale over the US. Climate Change Emissions Health Policy' —Trail et al. Trail, Alexandra P.

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EPA grants waiver for California’s Advanced Clean Car Program

Green Car Congress

The US Environmental Protection Agency (EPA) has formally granted a California Air Resources Board (CARB) request for a waiver of preemption for its Advanced Clean Car (ACC) regulations. EPA also determined that the waiver includes the new “deemed to comply” regulation. Earlier post.) Background.

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Perspective: The Role of Offsets in Climate Change Legislation

Green Car Congress

This article shows that including offsets in climate change legislation would likely make an emissions program more cost-effective by: (a) providing an incentive for non-regulated sources to generate emission reductions; and (b) expanding emission compliance opportunities for regulated entities. Assuming the offset is legitimate—i.e.,

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EPA re-opens Mid-Term Evaluation Process for light-duty vehicle greenhouse gas standards 2022-2025

Green Car Congress

EPA Administrator Scott Pruitt and Department of Transportation Secretary Elaine Chao announced that EPA intends to reconsider its final determination issued on 12 January 2017 which recommended no change to the greenhouse gas standards for light duty vehicles for model years 2022- 2025. Earlier post.) Background.

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State Department issues Draft Supplemental Environmental Impact Statement on Keystone XL Pipeline: climate change impacts

Green Car Congress

The document is a detailed draft technical review of potential environmental impacts associated with the segment of the pipeline in the US, including: impacts from construction, impacts from potential spills, impacts related to climate change, and economic impacts. What Keystone XL would carry. Draft SEIS.