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Truck OEMs Challenge Clean Truck Partnership in Federal Court

(Advanced Clean Tech News) Four of the nation’s largest heavy-duty truck makers have filed a lawsuit in the U.S. District Court for the Eastern District of California, challenging the California Air Resources Board (CARB) and Governor Gavin Newsom’s ability to enforce certain state

August 14, 2025 Read Full Article

CARB Approves Flexibility-Focused Amendments to Clean Truck Rules

(Advanced Clean Tech News) The California Air Resources Board (CARB) has approved a series of amendments to the state’s Advanced Clean Trucks (ACT) and Zero-Emission Powertrain (ZEP) Certification regulations, aimed at preserving emissions benefits while offering truck manufacturers additional flexibility to

July 31, 2025 Read Full Article

Renewable Fuels Get a Boost and California Policies Get a Reset

by Allen Schaeffer (Engine Technology Forum)  ... Last week, two major policy developments are resetting the debate about the future of vehicles and fuels. First, after several years of lackluster federal policy support for renewable fuels – even below what was actually

June 18, 2025 Read Full Article

Governors Should End California’s Ludicrous and Harmful Electric Vehicle Mandate

by Mario H. Lopez (Hispanic Leadership Fund/The Hill) ... In granting a waiver to implement California’s Advanced Clean Cars II regulations, the EPA attempted to clear the road for other states to go beyond existing federal regulations and sign on to

June 12, 2025 Read Full Article

Trump Blocks California E.V. Rules in Latest Move to Rein In the State

by Laurel Rosenhall and Lisa Friedman (New York Times)  California leaders said the state intends to challenge the move in court, and to find new ways to move drivers toward electric vehicles. -- President Trump signed joint resolutions of Congress on Thursday

June 12, 2025 Read Full Article

Trump to Revoke California Vehicle Emission Rules on Thursday

by Alex Nieves (Politico) President Donald Trump plans to sign a trio of resolutions Thursday to revoke California’s nation-leading vehicle emissions standards. Sen. Shelley Moore Capito (R-W.Va.), author of a resolution to nix the state’s electric vehicle sales mandate via the Congressional Review Act,

June 11, 2025 Read Full Article

Senate Will Try to Block California Vehicle Standards that Would Phase out Gas-Powered Cars

by Mary Clare Jalonick and Matthew Daly (Associated Press)  The U.S. Senate will move this week to block California from enforcing a series of vehicle emissions standards that are tougher than the federal government’s, including first-in-the-nation rules phasing out the sale

May 21, 2025 Read Full Article

Reality Check on Trucking Technology

by Allen Schaeffer (Engine Technology Forum)  ... More than 97% of Class 8 trucks are powered by diesel engines. Insights from last week’s ACT Expo – the Advanced Clean Transportation event hosted by TRC – offered a compelling glimpse into the future of trucking. Understandably,

May 07, 2025 Read Full Article

House Votes to Revoke California’s Clean Cars Rule

by: James Bikales and Alex Nieves (Politico Pro)  Thirty-five Democrats joined all Republicans in voting to clear the Congressional Review Act resolution. --  The House voted Thursday (May 1, 2025) to overturn California’s nation-leading clean cars rule, setting up a high-stakes vote

May 02, 2025 Read Full Article

Oil Industry Launches Ads Targeting California’s Vehicle Rules

by Alex Nieves (Politico Pro Enegywire) The American Fuel & Petrochemical Manufacturers unveiled a campaign focused on lawmakers in six states. -- The oil industry launched an advertising campaign Monday aimed at pressuring congressional lawmakers to revoke California’s vehicle emissions rules. What happened: American

April 15, 2025 Read Full Article

Senate Parliamentarian Rules against GOP on California Waivers

by Timothy Cama and Kelsey Brugger (Poltico Pro E&E NewsPM) The parliamentarian said lawmakers can’t undo Biden-era waivers under the Congressional Review Act. Republicans will try anyway. -- Republicans hoping to stop California's strict vehicle emissions rules ran into another problem

April 07, 2025 Read Full Article

Rep. Troy E. Nehls Reintroduces Bill to Repeal California’s Emissions Waiver Exemption

(Office of Congressman Troy E. Nehls (R-TX-22)) Congressman Troy E. Nehls (R-TX-22) reintroduced the Stop California from Advancing Regulatory Burden (CARB) Act of 2025. Senator Mike Lee (R-UT) is leading the Senate companion to this legislation.   In 1970, Congress passed the Clean Air Act, which authorized

March 18, 2025 Read Full Article

Car Dealers Launch Ad Campaign to Delay California EV Mandate

by Alex Nieves (Politico Pro Energywire) The California New Car Dealers Association is funding a media buy targeting the state’s emissions rule. -- Car dealers launched an ad campaign Monday calling on California to delay enforcement of its electric vehicle mandate, warning

February 25, 2025 Read Full Article

The Trump Administration Is Trying an End Run around Revoking California’s Car and Truck Rules

by Ann Carlson and Mary Nichols (Legal Planet) Last Friday, EPA’s Administrator Lee Zeldin announced a new and unprecedented way to try to prevent California from implementing its ambitious program to move toward 100 percent  zero emission vehicles. This time around, the Trump

February 18, 2025 Read Full Article

Course Correction: California’s Withdrawal of Its Clean Air Act Waiver Request to EPA

by Allen Schaeffer (Engine Technology Forum)  ... Newly inaugurated President Donald Trump has already issued executive orders to withdrawal the US from the Paris climate accord, eliminate the EV tax credit, and unleash American energy; measures that largely reverse course on the past

January 22, 2025 Read Full Article

Industry Group Contests EPA Waivers For California ZEV, Truck NOx Rules

(Inside EPA)  An industry group is filing quick legal challenges to EPA’s Clean Air Act preemption waivers for California’s latest Advanced Clean Cars II (ACC II) program and the state’s heavy truck nitrogen oxides (NOx) standards, teeing up what could be

January 08, 2025 Read Full Article

EPA Grants Waiver for California’s Advanced Clean Cars II Regulations

(U.S. Environmental Protection Agency) Agency additionally grants waiver for low-NOx regulations for heavy-duty and off-road vehicles and engines  --  Today, the U.S. Environmental Protection Agency (EPA) is granting two requests from the California Air Resources Board (CARB) for waivers to implement and enforce

December 18, 2024 Read Full Article

California and the Need for Pocketbook Pragmatism

(Engine Technology Forum Policy Insider Blog) California’s influence on environmental and climate policy is both undeniable and increasingly controversial. A 2035 ban on the sale of new internal combustion engine (gasoline) light-duty vehicles and the mandated sale of zero-emission commercial vehicles

December 11, 2024 Read Full Article

Special Issue: What to Expect during the Trump II Presidency

(American Energy Society/Energy Matters)  From experience, we all know that when Donald Trump is president, nothing is certain. It is hard to predict how the energy sector will change, both domestically or around the world. This special issue of Energy Matters

November 12, 2024 Read Full Article

States That Adopted California Truck Emissions Rules Seek Leeway

by Drew Hutchinson (Bloomberg Law)  States plan agency, legislative moves to delay emissions rules; Two California regulations clash with each other, group says -- Some states are second-guessing when and how to enforce the zero-emission truck quotas and tailpipe emissions standards they adopted

October 30, 2024 Read Full Article

Modeling Maryland’s Climate and Clean Energy Goals and Investment Requirements

(Center for Climate Strategies)  CCS unveiled its latest report assessing Maryland's greenhouse gas (GHG) emissions trends and the potential for actions in all sectors to reach ambitious climate and clean energy goals, deliver energy and financial savings, and mobilize investment at

March 30, 2024 Read Full Article

Embracing the Advanced Clean Trucks Rule, or Not?

by Emma Frantz (ACT News) ... Originating in California from a need to curb air pollution and reduce greenhouse gas emissions, this regulatory initiative emerged as a pivotal strategy to decarbonize and reduce the environmental footprint of the trucking industry. The ACT

January 18, 2024 Read Full Article

Werner CEO Leathers Warns of Supply Chain Effects with Overzealous Clean Truck Regulations

by John D. Schulz (Logistics Management) The chief executive of one of America's largest trucking fleets is warning of the unintended consequences of “an avalanche” of state and federal mandates for electric trucks. Derek Leathers, president and CEO of Werner Enterprises,

October 19, 2023 Read Full Article

For First Time, 50% of California Diesel Fuel Is Replaced by Clean Fuels

(California Air Resources Board (CARB)/Clean Technica)  California hit an important milestone in its shift away from polluting fuel sources, with clean fuels replacing over 50% of the diesel used in the state in the first quarter of 2023. California’s Low Carbon Fuel

August 28, 2023 Read Full Article

19 States Target EPA Waiver for California’s Advanced Clean Trucks Rule

by John Kingston (Freight Waves) Overwhelmingly red states challenge waiver on rule governing what OEMs must sell into the state by 2042  --  Nineteen states have sought appellate court review in a challenge to the Environmental Protection Agency waiver granted to

June 08, 2023 Read Full Article

QUOTE OF THE WEEK -- Allen Schaeffer

"Reducing carbon and other emissions in the near term in California and beyond will likely depend more on the next generation of super clean diesel trucks using blends of renewable biodiesel fuels."  Allen Schaeffer, Executive Director of the Diesel Technology

May 02, 2023 Read Full Article

What to Make of California’s Advanced Clean Fleet Rule

by Allen Schaeffer (Diesel Technology Forum)  The California Air Resources Board (CARB) adopted another far-reaching regulation that dictates what kind of trucks and fuels can be used in California in the future. Last week’s move comes on the heels of the

May 02, 2023 Read Full Article

Colorado Adopts ‘Advanced Clean Trucks’ Rule to Speed Transition to Heavy-Duty EVs

by Chase Woodruff (Colorado Newsline) Air quality panel unanimously approves California-style standards after yearlong delay -- Colorado air quality regulators on Friday (April 28, 2023) approved a pair of rules aimed at reducing pollution from truck engines and speeding up adoption

May 01, 2023 Read Full Article

Trucking Industry Worries US EPA Put 'Cart before the Horse' with Emissions Proposal

by Jasmin Melvin (S&P Global)  EPA, California rules look to phase out diesel trucks; Will require more trucks to haul same amount of freight; Range, charging and power needs still present challenges  --  While onboard with ambitions to transition the US car fleet

April 20, 2023 Read Full Article

Massachusetts Moves Forward with Advanced Clean Cars II Program, Formally Adopting Policy to Slash Transportation Pollution & Provide More EV Choices to Consumers

(Sierra Club)  Today (March 30, 2023), Massachusetts announced its formal adoption of the Advanced Clean Cars II (ACC) rule, which requires auto manufacturers to ensure that every new light-duty car sold in the state is a zero-emission vehicle (ZEV) by

April 03, 2023 Read Full Article

Biden-Backed California Rule Pushes Clean Trucks

by Camille Von Kenel and Alex Guillen (Politico) Truck manufacturers will have to sell an increasing share of zero emissions vehicles now that the EPA has approved California’s regulations. California will require more zero emission trucks on the roads after a

March 31, 2023 Read Full Article

2022 Scoping Plan for Achieving Carbon Neutrality

(California Air Resources Board) This Scoping Plan lays out the sector-by-sector roadmap for California, the world’s fifth1 largest economy, to achieve carbon neutrality by 2045 or earlier, outlining a technologically feasible, cost-effective, and equity-focused path to achieve the state’s climate

November 18, 2022 Read Full Article

EPA to Expand Calif. Clean Car Authority — and the Nation’s

by Arianna Skibell (E&E News) The Biden administration is preparing to reinstate California’s authority to set auto emissions rules that are more stringent than federal standards, taking a major step toward cutting transportation-related climate pollution and continuing to chip away at

February 16, 2022 Read Full Article

In an East Coast First, New Jersey Will Phase out Diesel Trucks

by María Paula Rubiano A. (Grist)  New Jersey joins California, Oregon, and Washington in setting ambitious goals to electrify trucks by 2035. -- The New Jersey Department of Environmental Protection earlier this week adopted a rule to phase out diesel-powered trucks –

January 03, 2022 Read Full Article

Diesel-Powered Trucks Vital to California and the U.S. Economy, Achieving Climate and Clean Air Goals

(Diesel Technology Forum)  ... California’s truck and bus fleet rule has disrupted the marketplace, effectively delaying regular fleet turnover rates, keeping older, higher emitting trucks on the road for longer, and in turn delaying emissions reductions and cleaner air.  “California’s consideration

July 01, 2020 Read Full Article
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(generally regarded as safe) Grasses grasshoppers grease Great Green Fleet Great Lakes Greece green bonds green chemistry Green Deal EU green economy green house facility Green Jobs Green New Deal Green Racing Green Recovery green/black economy Greenland GREET Greenhouse Gases Regulated Emissions and Energy Use in Transportation Model Grenada gribble growers gua beans Guam guar Guatemala Guava Seed guayule Guerbet reaction Guinea Guinea Bissau Gulf states gulmohar Gumweed (grindelia squarosa) Guyana GWP gypsum h Haiti Halophytes harvest site processing harvesting Hawai'i hay hazardous waste hazelnut HBIIP Higher Blends Infrastructure Incentive Program HDCJ HDO-SAK (hydro deoxygenated synthetic aromatic kerosene) health health benefits health effects heat of combustion heat of vaporization heat-tolerance heather heating oil/fuel Heavy Duty Truck Rule heavy duty vehicles (HDV) hedging HEFA (Hydro-processed esters and fatty acids) HEFA50 helicopters hemicellulace enzymes hemicellulose hemicellulosic sugars Hemp hemp oil hemp seed herb hexanol HFO (Heavy Residual Fuel Oil) hibiscus high blend renewable fuels (HBRF) High Hydrogen Content Synthetic Paraffinic Kerosene (HHC-SPK) High Octane Fuel (HOF) High Octane Fuel Standard High Octane Gasoline (HOG) high octane low carbon (HOLC) fuel High Octane Vehicles (HOV) high performance regular high school project high sulphur fuel oil (HSFO) high-octane/low-carbon (HOLC) liquid fuels Highway Bill highway rights-of-way Highway Trust Fund history hog farmers hombayniya homogeneous-charge compression-ignition Honduras honey locust Hong Kong Honge tree nuts hops horticulture Housing and Urban Development (HUD) HPF (High Performance Fuels) HRJ (Hydrotreated Renewable Jet) human rights Hungary Hurricane Sandy HVO (Hydrotreated vegetable oil) HVO100 HVO20 HVO30 Hybrid aircraft hybrid buses hybrid locomotive hybrid ships hybrids hydrocarbon fuels Hydrocarbon-Hydroprocesed Esters and Fatty Acids (HC-HEFA-SPK) hydrodeoxygenation hydrodiesel hydrofaction hydroformylation hydrogen aircraft hydrogen carrier hydrogen combustion engines hydrogen fuel cells hydrogen internal combustion engines hydrogen leaks hydrogen pipeline hydrogen pumps/fueling stations hydrogen tax credit hydrogen terminal Hydrogen/Renewable Hydrogen Hydrogen/Renewable Hydrogen Price hydrogenase hydrogenation hydrogenation-derived renewable diesel (HDRD) hydrogenolysis hydropower Hydroprocessed fermented sugars to synthetic isoparaffins (HFS-SIP) hydroprocessing hydropyrolysis hydrothermal carbonization hydrothermal gasification hydrothermal liquefaction (HTL) hydrothermal treatment Hydrotreated renewable diesel (HRD) hydrotreating hydrotreatment hydrous ethanol hypoxia zone Iceland Idaho Illinois Illiois illuppai ILUC (Indirect/Induced Land Use Change) import/export incinerator ash India Indian beech tree Indian grass Indiana indirect effects indirect emissions indirect fuel use change indium Indonesia industrial burners industrial ethanol 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land use land use change land use policy landfill methane Landfills landscape Laos Latin America Latvia LCFS (Low Carbon Fuel Standard) lead Leadtree leaf ant Lebanon lecithin legislation Legislation-Federal Legislation-State lemna lend-lease Lesotho lesquerella leucaena levulinic acid Liberia Libya licensing lichens life cycle analysis (LCA) light rail lignin Lignin Ethanol Oil (LEO) Lignocellulosic Biofuel lignocellulosic sugars lime Lipid liquefaction liquid liquid petroleum gas (LPG) liquid transportation fuels liquidation Liquified Biogas (LBG) Liquified Biogas (LBG) pumps liquified biomethane (LBM) Liquified Natural Gas (LNG) lithium Lithuania litigation Litigation-Federal Litigation-State livestock loan guarantees loans lobbying loblolly pine locomotives lodgepole pine logistics long-term contracts Louis Louisiana low c low carbon emissions low carbon octane standard (LCOS) Low Emission Vehicle Standards (LEV) low sulfur diesel low sulfur fuel low sulfur marine fuel LSMGO (Low 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