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A pre-print study from smoke researcher Marshall Burke and others shows how fires are eating into air quality gains.
The Greater Los Angeles area is awash in smoke and ash as multiple fires burn in and around the city. It’s too soon to assess the overall pollution impacts from this rare January event, but we know the smoke is filled with tiny particles known as PM2.5, one of the most pernicious public health villains, associated with increased risk of respiratory and heart disease and premature death.
Last year, the Environmental Protection Agency tightened the National Ambient Air Quality Standard for PM2.5 for the first time since 2012. The South Coast Air Quality District, which contains Los Angeles, is known for having some of the worst air quality in the country. State officials have already deemed it to be out of compliance — and that’s without even counting pollution from major wildfires. But new research raises questions about whether complying with the new standard will even be possible in many places due to the increasing frequency and severity of wildfires.
Marshall Burke, who published the not-yet-peer-reviewed findings in December, is a Stanford University researcher who has spent the past several years investigating how wildfires have affected PM2.5 exposure in the U.S. In a 2023 paper published in Nature, he and his co-authors found that over just six years, wildfire smoke eroded decades of air quality improvements throughout the country. The trend was particularly bad in Western states, of course — some of which saw more than half of their gains erased. The pre-print of the new paper updates those findings to include data from 2023. But it also goes deeper on what this means in light of the new air quality standards. The authors find that 34% of air monitoring stations registered PM2.5 above the regulatory limit because of smoke in at least one of the last five years.
Technically, wildfire smoke is completely unregulated. Jurisdictions can request to exclude “exceptional events,” such as days when PM2.5 spiked due to wildfire, from their calculations. But as the “smoke season” has grown longer and more places experience more days with degraded air quality due to smoke, local officials have not been requesting more exemptions. The researchers analyzed applications for exemptions since 2019, and found that they were more common on days with higher levels of wildfire smoke, but were still infrequent overall.
One reason might be that local pollution control officers don’t always recognize when smoke has pushed pollution over the limit on a particular day versus other factors. There is also a “substantial resource burden involved” in demonstrating the influence of wildfire smoke on ambient air quality, the paper says. Also, as smoke becomes more commonplace, it may be more difficult for officials to make the case that a given smoke event is “exceptional.”
In any case, if this low rate of applications for exemptions continues, many more regions may find themselves to be out of compliance with the new PM2.5 standard.
In the paper’s discussion section, the researchers posit that as wildfire smoke continues to get worse, either of two possible scenarios could play out. In the first, air quality districts affected by smoke get better at applying for exemptions and therefore achieve compliance with the Clean Air Act, even as local air quality and public health deteriorate. In the second, they find other ways to stay in compliance with the standards, such as by tightening pollution caps on power plants and factories. “Such mitigation could be cost effective in many regions where abatement costs remain low relative to the benefits of further air quality improvements,” the authors write, “but could become onerous if wildfire smoke concentrations continue to grow, as is expected under a warming climate.”
The first scenario is bleak, and the second comes with a pretty big caveat. But those aren’t the only options — we can also reduce the risk of wildfires with better land-use planning and management. Unfortunately, promising strategies like controlled burns can push PM2.5 levels over the standard, and those are not exempt from reporting the way that wildfires are — creating a perverse incentive not to do them.
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A judge has lifted the administration’s stop-work order against Revolution Wind.
A federal court has lifted the Trump administration’s order to halt construction on the Revolution Wind farm off the coast of New England. The decision marks the renewables industry’s first major legal victory against a federal war on offshore wind.
The Interior Department ordered Orsted — the Danish company developing Revolution Wind — to halt construction of Revolution Wind on August 22, asserting in a one-page letter that it was “seeking to address concerns related to the protection of national security interests of the United States and prevention of interference with reasonable uses of the exclusive economic zone, the high seas, and the territorial seas.”
In a two-page ruling issued Monday, U.S. District Judge Royce Lamberth found that Orsted would presumably win its legal challenge against the stop work order, and that the company is “likely to suffer irreparable harm in the absence of an injunction,” which led him to lift the dictate from the Trump administration.
Orsted previously claimed in legal filings that delays from the stop work order could put the entire project in jeopardy by pushing its timeline beyond the terms of existing power purchase agreements, and that the company installing cable for the project only had a few months left to work on Revolution Wind before it had to move onto other client obligations through mid-2028. The company has also argued that the Trump administration is deliberately mischaracterizing discussions between the federal government and the company that took place before the project was fully approved.
It’s still unclear at this moment whether the Trump administration will appeal the decision. We’re still waiting on the outcome of a separate legal challenge brought by Democrat-controlled states against Trump’s anti-wind Day One executive order.
A new letter sent Friday asks for reams of documentation on developers’ compliance with the Bald and Golden Eagle Protection Act.
The Fish and Wildlife Service is sending letters to wind developers across the U.S. asking for volumes of records about eagle deaths, indicating an imminent crackdown on wind farms in the name of bird protection laws.
The Service on Friday sent developers a request for records related to their permits under the Bald and Golden Eagle Protection Act, which compels companies to obtain permission for “incidental take,” i.e. the documented disturbance of eagle species protected under the statute, whether said disturbance happens by accident or by happenstance due to the migration of the species. Developers who received the letter — a copy of which was reviewed by Heatmap — must provide a laundry list of documents to the Service within 30 days, including “information collected on each dead or injured eagle discovered.” The Service did not immediately respond to a request for comment.
These letters represent the rapid execution of an announcement made just a week ago by Interior Secretary Doug Burgum, who released a memo directing department staff to increase enforcement of the Bald and Golden Eagle Protection Act “to ensure that our national bird is not sacrificed for unreliable wind facilities.” The memo stated that all permitted wind facilities would receive records requests related to the eagle law by August 11 — so, based on what we’ve now seen and confirmed, they’re definitely doing that.
There’s cause for wind developers, renewables advocates, and climate activists to be alarmed here given the expanding horizon of enforcement of wildlife statutes, which have become a weapon for the administration against zero-carbon energy generation.
The August 4 memo directed the Service to refer “violations” of the Bald and Golden Eagle Protection Act to the agency solicitor’s office, with potential further referral to the Justice Department for criminal or civil charges. Violating this particular law can result in a fine of at least $100,000 per infraction, a year in prison, or both, and penalties increase if a company, organization, or individual breaks the law more than once. It’s worth noting at this point that according to FWS’s data, oil pits historically kill far more birds per year than wind turbines.
In a statement to Heatmap News, the American Clean Power Association defended the existing federal framework around protecting eagles from wind turbines, noted the nation’s bald eagle population has risen significantly overall in the past two decades, and claimed golden eagle populations are “stable, at the same time wind energy has been growing.”
“This is clear evidence that strong protections and reasonable permitting rules work. Wind and eagles are successfully co-existing,” ACP spokesperson Jason Ryan said.
The $7 billion program had been the only part of the Greenhouse Gas Reduction Fund not targeted for elimination by the Trump administration.
The Environmental Protection Agency plans to cancel grants awarded from the $7 billion Solar for All program, the final surviving grants from the Greenhouse Gas Reduction Fund, by the end of this week, The New York Times is reporting. Two sources also told the same to Heatmap.
Solar for All awarded funds to 60 nonprofits, tribes, state energy offices, and municipalities to deliver the benefits of solar energy — namely, utility bill savings — to low-income communities. Some of the programs are focused on rooftop solar, while others are building community solar, which enable residents that don’t own their homes to access cheaper power.
The EPA is drafting termination letters to all 60 grantees, the Times reported. An EPA spokesperson equivocated in response to emailed questions from Heatmap about the fate of the program. “With the passage of the One Big Beautiful Bill, EPA is working to ensure Congressional intent is fully implemented in accordance with the law,” the person said.
Although Solar for All was one of the programs affected by the Trump administration’s initial freeze on Inflation Reduction Act funding, EPA had resumed processing payments for recipients after a federal judge placed an injunction on the pause. But in mid-March, the EPA Office of the Inspector General announced its intent to audit Solar for All. The results of that audit have not yet been published.
The Solar for All grants are a subset of the $27 billion Greenhouse Gas Reduction Fund, most of which had been designated to set up a series of green lending programs. In March, Administrator Lee Zeldin accused the program of fraud, waste, and abuse — the so-called “gold bar” scandal — and attempted to claw back all $20 billion. Recipients of that funding are fighting the termination in an ongoing court case.
State attorneys generals are likely to challenge the Solar for All terminations in court, should they go through, a source familiar with the state programs told me.
All $7 billion under the program has been obligated to grantees, but the money is not yet fully out the door, as recipients must request reimbursements from the EPA as they spend down their grants. Very little has been spent so far, as many grantees opted to use the first year of the five-year program as a planning period.