Transportation
Does Federal Law Still Preempt State Standards Relating to Fuel Efficiency?
The answer may depend on what being “in effect” means.
If a tree falls in the forest but no one hears it, does it still make a sound? If a law hasn’t been formally repealed but can be violated with complete impunity, is it still in effect? This matters because federal law preempts state fuel efficiency standards if, but only if, a federal standard is “in effect.” Congress just eliminated any penalty for violating the federqal standards. Which means at best they have only a kind of ghostly existence, but no substance to speak of.
CONTINUE READINGClimate Issues in the 2026 Governor’s Race: Transportation
First in a series of posts outlining key challenges and opportunities facing California’s next governor.
In collaboration with California Environmental Voters, CLEE is leading a nonpartisan initiative to educate all candidates running for governor, as well as the public, on critical climate, energy, and environmental issues. In February, CLEE and CEV co-hosted a candidate forum featuring 90 minutes of discussion on these issues. And we’ve launched a public website, www.climatevote.org, …
Continue reading “Climate Issues in the 2026 Governor’s Race: Transportation”
CONTINUE READINGWhat Happens to State Regulation if the Endangerment Findings are Gone?
Answer: State authority wouldn’t suffer from the change and might expand in some ways.
If the Trump EPA successfully repeals the endangerment findings for vehicles and stationary sources, states will be the only resort for climate regulation. A key question is how the repeals would impact state power to regulate carbon emissions. The bottom line answers are: (1) the impact on state power regulate tailpipe emissions seems unclear but could be positive, (2) there would be no effect on state power to regulate stationary sources like power plants, and (3) plaintiffs suing oil companies would probably benefit. The detailed analysis is below.
CONTINUE READINGThe Overlooked Precedent Supporting EPA Regulation of Greenhouse Gases
Even Roberts and Scalia agreed that Mass. v. EPA is the law
An important precedent has been overlooked in the coverage of the Trump EPA’s repeal of the 2009 Endangerment Finding. The 2009 finding relied was based on , in which the Court had held that the Clean Air Act covers air pollution and directed EPA to determine whether greenhouse gases are harmful. One reason to worry about the litigation is that the conservatives Justices all dissented from Massachusetts v. EPA over the repeal. But there’s another equally important precedent: American Electric Power v. Connecticut (AEP). That ruling was joined by Chief Justice Roberts and Justice Scalia, so it may carry more weight.
CONTINUE READINGThe Affirmative Case for Finding Endangerment
Despite hairsplitting by the current EPA, finding endangerment is a no-brainer.
or EPA to decide that vehicle greenhouse gas (GHG) emissions aren’t harmful is iike NASA deciding that the earth isn’t round after all. Over the next year or two, lawyers will be picking over EPA’s detailed legal arguments. Let’s not get mired in the weeds. It’s crazy that this issue is even being raised.
In 2007, the Supreme Court told EPA to do two things: (1) consider whether GHGs endanger human health and welfare, and (2) if the answer is yes, regulate vehicle emissions of GHGs. That’s exactly what EPA did. Nothing has changed in the meantime.
Hot Take on the Endangerment Repeal
It’s a tweaked version of arguments that the Supreme Court rejected in 2007.
EPA’s argument for repealing the Endangerment Finding is basically a rehash of legal arguments that were rejected by the Supreme Court in 2007. These arguments haven’t improved with age. Notably, EPA doesn’t dare contest the science.
CONTINUE READINGMilestones in State Climate Policy
The first efforts to clean up the grid date back forty years, but state climate policy really got moving at the turn of the century.
The federal government’s interventions in climate policy have been erratic, driven by political polarization and alternating control of the White House. In contrast, state governments have engaged in steady campaigns to reduce carbon emissions. Some people seem to think this has been a recent innovation, but it has now been ongoing for a generation. Here are some the key milestone along the way, closing with Trump’s pledge to bulldoze state policies that don’t fall in line with his priorities.
CONTINUE READINGTrump is Trying to Make Us Pay More for Gas
The Drain is a weekly roundup of environmental and climate news from Legal Planet.
At a White House photo op last week, surrounded by rich auto executives and congressional Republicans, Trump delivered his latest blow to Americans’ pocketbooks by announcing a policy change that could cost us consumers up to $185 billion when filling up our tanks at the pump. If you’re scratching your head trying to recall this …
Continue reading “Trump is Trying to Make Us Pay More for Gas”
CONTINUE READINGHow California (And Other States) Can Drive Demand for Clean Trucks
CLEE and the Emmett Institute release new report today and will hold Jan. 13 webinar with Energy Commissioner Nancy Skinner keynote.
This post is co-authored by CLEE fellow Marie Grimm. California’s policies to phase out polluting diesel trucks with zero-emission models took a major hit this year from the federal government. In June 2025, Congress voted to overturn federal permission for California’s zero-emission truck mandate (although this vote is now subject to litigation). In July, Congress …
Continue reading “How California (And Other States) Can Drive Demand for Clean Trucks”
CONTINUE READINGThe Top Ten Things to be Thankful for this Year
It’s been a horrible year for federal environmental law, but there are hopeful developments elsewhere.
This is, if not the winter of our discontent, at least the late autumn. In terms of federal environmental policy, 2025 has been a disaster. Trump’s previous term in office pales by comparison. But all is not gloomy. Outside of D.C., there have been encouraging developments within the U.S. and globally.
Here are ten of those positive developments.
Join Our Mailing List
Climate policy is changing rapidly. Stay in the loop with expert analysis via email Monday - Friday.
