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Here’s what we know so far, including what’s changed since last year.
The Biden administration announced final new emissions standards for cars on Wednesday, significantly curtailing both the carbon dioxide and the toxic soot and chemicals that spew from the tailpipes of the nation’s light- and medium-duty vehicles.
With that, Biden is checking off one of the two most important pieces of unfinished climate business he has left on his first term to-do list. The rules tighten pollution limits gradually over six years, beginning in 2027. In concert with other Biden policies including consumer tax credits for electric vehicles purchases, initiatives to build out charging infrastructure, and support for domestic manufacturing, the standards will help accelerate the transition to electric vehicles that is already well underway.
Transportation is responsible for more planet-warming emissions than any other part of the U.S. economy. To get the country on the path of reaching net zero emissions by 2050, as Biden has set out to do, curbing car emissions is unavoidable.
When the rules were originally proposed last year, we wrote that they would “roughly halve carbon pollution from America’s massive car and truck fleet, the world’s third largest, within a decade.” That’s still broadly the case, even though the final version features one big change: Automakers will now have more time to cut emissions from their fleets. They will still have to achieve the same standard in 2032 as what was originally proposed, but they can transition to it more slowly.
Ahead of the official release, senior administration officials downplayed the significance of the slower rollout. They argued that giving automakers, dealers, and labor unions more time in the near-term would make for a sturdier rule, and that the cumulative emissions benefits of the final standard converge with the original proposal. At a White House event on Wednesday, members of the president’s climate team built on that message, framing the new rules not as a government mandate but rather as a tool to give consumers more of what they already want. “We are witnessing a technological revolution driven by the markets,” Environmental Protection Agency administrator Michael Regan proclaimed.
Also speaking at the event was John Bozzella, head of the Alliance for Automotive Innovation, which represents most U.S. automakers, including the Big Three. Bozzella praised the administration for heeding the industry’s concerns over the original proposal’s rapid phase-in and said the new rules were “much improved” from what had initially been proposed. “Pace matters to automakers,” he said. “It certainly matters to consumers.”
The full rule was released mid-day Wednesday, and we’re digging through it to find out exactly what else has changed. But here’s what we know so far.
The rules strengthen greenhouse gas emission limits, in terms of grams of CO2 per mile, that automakers will have to adhere to, on average, across their product lines. They also tighten limits on dangerous pollutants, including particulate matter — the tiny bits that make up soot — and nitrogen oxides.
This chart shows how the cuts in the final rule compare to those proposed in the draft rule. The version released last April required automakers to make steeper reductions to carbon emissions in the first three years, while the final rule allows for a more gradual reduction.
No. They are what’s called technology-neutral standards, meaning that automakers have options for how to comply with them. Since automakers have to meet the emissions targets on average across their fleets, rather than for each vehicle, it’s likely they’ll produce a range of options in 2032, including plug-in hybrids, regular hybrids, and even some gas cars with improved efficiency — though their fleets will probably have a much higher proportion of EVs than they do now.
While that generally hasn’t changed from the preliminary rule, the Biden administration’s messaging around it has.
When it released the initial proposal, the EPA emphasized that the least-cost path to achieving the standards would be for about two-thirds of new vehicles sold in 2032 to be electric. Although this was just one potential scenario, it was widely interpreted as a target or even a mandate — particularly by Biden’s political opponents.
On Tuesday, administration officials said that the two-thirds finding had been based on limited data. The EPA now estimates that EVs may make up anywhere between 30% and 56% of new light-duty sales from model years 2030 to 2032.
By 2032, the light-duty fleet on offer from automakers will emit half as much carbon as vehicles on the market in 2026.
The EPA estimates that these rules will avoid 7.2 billion metric tons of carbon from 2027 to 2055, which accounts for the vehicles’ full lifetime on the road. That’s slightly less than the 7.3 billion metric tons the initial proposal would have avoided.
The rules will change the mix of vehicles sold by automakers, encouraging dealers to sell more hybrid, plug-in hybrid, and battery electric vehicles. They’re also expected to save Americans roughly $62 billion in fuel costs and avoided maintenance costs, since the EPA assumes that EVs are still cheaper to operate and maintain. On average, a consumer will save about $6,000 over the lifetime of a 2032 vehicle compared to one sold in 2026, according to the agency.
The tailpipe rule will likely increase the cost of building each vehicle, which could translate into higher prices for consumers. However, state and federal tax incentives — as well as the cheaper cost of operating and fueling EVs — will offset that increase.
The rules are projected to deliver major health and environmental benefits to the public. The EPA estimates they will produce $37 billion in benefits from improved public health and climate mitigation, including avoided hospitalizations and premature deaths.
This is what the EPA was created to do — use the best available science to protect human health and the environment. But even after decades of improvements in air quality, there is still a lot of room for improvement. More than one third of the population still live in places with unhealthy levels of ozone or particulate pollution, according to The American Lung Association’s most recent “ state of the air” report. The risks are deeply unequal, with people of color making up half of those exposed. The report also noted that climate change is making it harder to protect people, as heat, drought, and wildfires increasingly lead to spikes in these pollutants. Altogether, ozone and particulate matter are responsible for more than 60,000 premature deaths annually, according to the Health Effects Institute, a nonprofit, independent research organization funded by the EPA and automakers.
Officials stressed that EV sales are already shattering analyst predictions, prices are dropping, and product availability is growing. They see this rule as part of a larger ecosystem of policies — including those in the Inflation Reduction Act, the Bipartisan Infrastructure Law, and the CHIPS and Science Act — that are revitalizing American manufacturing and creating jobs while also contributing to the global fight against climate change. The EPA’s press release notes that companies have announced more than $160 billion in domestic clean vehicle manufacturing, and that the auto manufacturing sector as a whole has added more than 100,000 jobs since Biden took office.
The administration is also, perhaps less loudly, selling the pollution standards as a path to freedom from fossil fuels. During the press call Tuesday, a senior administration official said the rules would enable consumers to break loose from the oil industry’s grip on how we get around and how much it costs us.
The new rules kick in for cars in model year 2027, which will go on sale in 2026 and are being designed right now. Although the Biden administration has suggested that the new rules have won the support of the car industry — including automakers, labor unions, and dealerships — it could still face a court challenge from attorneys general in Republican-controlled states. Republican officials have repeatedly sued to block the Biden administration’s climate policies.
It’s unclear how the Supreme Court would respond to such a challenge. Although the Court has long backed the EPA’s ability to limit climate pollution from cars and trucks, its hard-right majority has recently rolled back what were once thought to be bedrock environmental laws. In this term alone, the Court seems likely to restrict the EPA’s ability to regulate toxic air pollution while sweeping away a central legal doctrine of environmental regulation.
Editor’s note: This story has been updated to reflect the White House event announcing the new rules.
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New York City may very well be the epicenter of this particular fight.
It’s official: the Moss Landing battery fire has galvanized a gigantic pipeline of opposition to energy storage systems across the country.
As I’ve chronicled extensively throughout this year, Moss Landing was a technological outlier that used outdated battery technology. But the January incident played into existing fears and anxieties across the U.S. about the dangers of large battery fires generally, latent from years of e-scooters and cellphones ablaze from faulty lithium-ion tech. Concerned residents fighting projects in their backyards have successfully seized upon the fact that there’s no known way to quickly extinguish big fires at energy storage sites, and are winning particularly in wildfire-prone areas.
How successful was Moss Landing at enlivening opponents of energy storage? Since the California disaster six months ago, more than 6 gigawatts of BESS has received opposition from activists explicitly tying their campaigns to the incident, Heatmap Pro® researcher Charlie Clynes told me in an interview earlier this month.
Matt Eisenson of Columbia University’s Sabin Center for Climate Law agreed that there’s been a spike in opposition, telling me that we are currently seeing “more instances of opposition to battery storage than we have in past years.” And while Eisenson said he couldn’t speak to the impacts of the fire specifically on that rise, he acknowledged that the disaster set “a harmful precedent” at the same time “battery storage is becoming much more present.”
“The type of fire that occurred there is unlikely to occur with modern technology, but the Moss Landing example [now] tends to come up across the country,” Eisenson said.
Some of the fresh opposition is in rural agricultural communities such as Grundy County, Illinois, which just banned energy storage systems indefinitely “until the science is settled.” But the most crucial place to watch seems to be New York City, for two reasons: One, it’s where a lot of energy storage is being developed all at once; and two, it has a hyper-saturated media market where criticism can receive more national media attention than it would in other parts of the country.
Someone who’s felt this pressure firsthand is Nick Lombardi, senior vice president of project development for battery storage company NineDot Energy. NineDot and other battery storage developers had spent years laying the groundwork in New York City to build out the energy storage necessary for the city to meet its net-zero climate goals. More recently they’ve faced crowds of protestors against a battery storage facility in Queens, and in Staten Island endured hecklers at public meetings.
“We’ve been developing projects in New York City for a few years now, and for a long time we didn’t run into opposition to our projects or really any sort of meaningful negative coverage in the press. All of that really changed about six months ago,” Lombardi said.
The battery storage developer insists that opposition to the technology is not popular and represents a fringe group. Lombardi told me that the company has more than 50 battery storage sites in development across New York City, and only faced “durable opposition” at “three or four sites.” The company also told me it has yet to receive the kind of email complaint flood that would demonstrate widespread opposition.
This is visible in the politicians who’ve picked up the anti-BESS mantle: GOP mayoral candidate Curtis Sliwa’s become a champion for the cause, but mayor Eric Adams’ “City of Yes” campaign itself would provide for the construction of these facilities. (While Democratic mayoral nominee Zohran Mamdani has not focused on BESS, it’s quite unlikely the climate hawkish democratic socialist would try to derail these projects.)
Lombardi told me he now views Moss Landing as a “catalyst” for opposition in the NYC metro area. “Suddenly there’s national headlines about what’s happening,” he told me. “There were incidents in the past that were in the news, but Moss Landing was headline news for a while, and that combined with the fact people knew it was happening in their city combined to create a new level of awareness.”
He added that six months after the blaze, it feels like developers in the city have a better handle on the situation. “We’ve spent a lot of time in reaction to that to make sure we’re organized and making sure we’re in contact with elected officials, community officials, [and] coordinated with utilities,” Lombardi said.
And more on the biggest conflicts around renewable energy projects in Kentucky, Ohio, and Maryland.
1. St. Croix County, Wisconsin - Solar opponents in this county see themselves as the front line in the fight over Trump’s “Big Beautiful” law and its repeal of Inflation Reduction Act tax credits.
2. Barren County, Kentucky - How much wood could a Wood Duck solar farm chuck if it didn’t get approved in the first place? We may be about to find out.
3. Iberia Parish, Louisiana - Another potential proxy battle over IRA tax credits is going down in Louisiana, where residents are calling to extend a solar moratorium that is about to expire so projects can’t start construction.
4. Baltimore County, Maryland – The fight over a transmission line in Maryland could have lasting impacts for renewable energy across the country.
5. Worcester County, Maryland – Elsewhere in Maryland, the MarWin offshore wind project appears to have landed in the crosshairs of Trump’s Environmental Protection Agency.
6. Clark County, Ohio - Consider me wishing Invenergy good luck getting a new solar farm permitted in Ohio.
7. Searcy County, Arkansas - An anti-wind state legislator has gone and posted a slide deck that RWE provided to county officials, ginning up fresh uproar against potential wind development.
Talking local development moratoria with Heatmap’s own Charlie Clynes.
This week’s conversation is special: I chatted with Charlie Clynes, Heatmap Pro®’s very own in-house researcher. Charlie just released a herculean project tracking all of the nation’s county-level moratoria and restrictive ordinances attacking renewable energy. The conclusion? Essentially a fifth of the country is now either closed off to solar and wind entirely or much harder to build. I decided to chat with him about the work so you could hear about why it’s an important report you should most definitely read.
The following chat was lightly edited for clarity. Let’s dive in.
Tell me about the project you embarked on here.
Heatmap’s research team set out last June to call every county in the United States that had zoning authority, and we asked them if they’ve passed ordinances to restrict renewable energy, or if they have renewable energy projects in their communities that have been opposed. There’s specific criteria we’ve used to determine if an ordinance is restrictive, but by and large, it’s pretty easy to tell once a county sends you an ordinance if it is going to restrict development or not.
The vast majority of counties responded, and this has been a process that’s allowed us to gather an extraordinary amount of data about whether counties have been restricting wind, solar and other renewables. The topline conclusion is that restrictions are much worse than previously accounted for. I mean, 605 counties now have some type of restriction on renewable energy — setbacks that make it really hard to build wind or solar, moratoriums that outright ban wind and solar. Then there’s 182 municipality laws where counties don’t have zoning jurisdiction.
We’re seeing this pretty much everywhere throughout the country. No place is safe except for states who put in laws preventing jurisdictions from passing restrictions — and even then, renewable energy companies are facing uphill battles in getting to a point in the process where the state will step in and overrule a county restriction. It’s bad.
Getting into the nitty-gritty, what has changed in the past few years? We’ve known these numbers were increasing, but what do you think accounts for the status we’re in now?
One is we’re seeing a high number of renewables coming into communities. But I think attitudes started changing too, especially in places that have been fairly saturated with renewable energy like Virginia, where solar’s been a presence for more than a decade now. There have been enough projects where people have bad experiences that color their opinion of the industry as a whole.
There’s also a few narratives that have taken shape. One is this idea solar is eating up prime farmland, or that it’ll erode the rural character of that area. Another big one is the environment, especially with wind on bird deaths, even though the number of birds killed by wind sounds big until you compare it to other sources.
There are so many developers and so many projects in so many places of the world that there are examples where either something goes wrong with a project or a developer doesn’t follow best practices. I think those have a lot more staying power in the public perception of renewable energy than the many successful projects that go without a hiccup and don’t bother people.
Are people saying no outright to renewable energy? Or is this saying yes with some form of reasonable restrictions?
It depends on where you look and how much solar there is in a community.
One thing I’ve seen in Virginia, for example, is counties setting caps on the total acreage solar can occupy, and those will be only 20 acres above the solar already built, so it’s effectively blocking solar. In places that are more sparsely populated, you tend to see restrictive setbacks that have the effect of outright banning wind — mile-long setbacks are often insurmountable for developers. Or there’ll be regulations to constrict the scale of a project quite a bit but don’t ban the technologies outright.
What in your research gives you hope?
States that have administrations determined to build out renewables have started to override these local restrictions: Michigan, Illinois, Washington, California, a few others. This is almost certainly going to have an impact.
I think the other thing is there are places in red states that have had very good experiences with renewable energy by and large. Texas, despite having the most wind generation in the nation, has not seen nearly as much opposition to wind, solar, and battery storage. It’s owing to the fact people in Texas generally are inclined to support energy projects in general and have seen wind and solar bring money into these small communities that otherwise wouldn’t get a lot of attention.