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If you’re of a certain age, you probably remember the hole in the ozone layer. Like Joseph Kony and Livestrong wristbands, the obsession over O3 now feels like a cultural artifact, thanks to ozone depletion being one of the rare success stories of international environmental cooperation. Since the world banned chlorofluorocarbons under the Montreal Protocol in 1987, the holes over the North and South poles have steadily recovered.
Today, if you hear about “ozone” at all, it’s much more likely to be from an air quality alert on your phone. Unlike the stratospheric ozone that we were all so concerned about in the 1980s and 1990s, which makes up a protective layer around the planet that insulates us from the sun’s cancer-causing ultraviolet rays, “tropospheric” or “ground-level” ozone is mainly man-made. In fact, when people throw around the word “pollution,” what they’re probably talking about is ground-level ozone, which is created by a chemical reaction between nitrogen oxides (highly reactive gases produced by burning fuels) and volatile organic compounds (organic compounds that easily evaporate under normal environmental conditions and can be found in vehicle exhaust as well as scented personal care products like deodorants, lotions, and bug sprays), plus sunlight. This chemical reaction usually occurs when cars, refineries, power plants, and other industrial sources emit pollutants into the environment during a hot, clear day. You probably know the result by its other name: smog.
Ozone is a climate issue not just because it is yet another concerning consequence of burning fossil fuels. According to some estimates, high levels of ground-level ozone pollution could grow in frequency by three to nine additional days per year by 2050 because of the gas’s close relationship with intense sunlight and high temperatures. While ozone dissipates fairly quickly once those conditions go away, it can build up while they last. Hot days, which are increasing in the U.S., also coincide with weak winds and stagnant air — conditions that allow ozone to accumulate in one place.
When the temperatures start to rise, here’s what you need to know and what you can do to protect yourself and others from ozone pollution.
Different pollutants cause concern at different concentrations. The Air Quality Index is designed so that, in theory, a level of “100” corresponds to the point at which people in sensitive populations might start to be affected by the pollutant in question. (To learn more about how the AQI is calculated, you can read our explainer here).
That said, “The evidence has clearly been increasing that lower levels of ozone — levels well below the current standard of 70 parts per billion — are causing more health impacts,” Katherine Pruitt, the national senior director of policy at the American Lung Association, which is campaigning to strengthen the standard to 55 to 60 parts per billion, told me.
As Pruitt explained, ozone is a caustic irritant and can corrode metals. Breathing it in can cause inflammation in anyone, “from vulnerable children and elders to even the fittest elite athletes,” Pruitt said, adding that it is, “at some level, like getting a sunburn on your lungs.” Anyone who spends time outside is vulnerable to ozone, but the more sensitive groups — including children; the elderly; people with asthma, chronic heart disease, and other diseases; and pregnant women — are at a higher risk. They might already be paying more attention to the AQI levels in their area, and will potentially notice that they need to slow down and limit exertion during “yellow” or “orange”-level ozone events.
In the short term, ozone pollution can cause coughing, shortness of breath, and a lowered immune response, on top of aggravating any preexisting lung conditions or diseases. But Pruitt stressed to me that “living in places that have high levels of ozone day in and day out, for months and years, can cause respiratory diseases, nervous system disorders, metabolic disorders, reproductive problems, and mortality. It’s not just a cough and a wheeze on one bad air day.”
Ozone requires two main ingredients: the burning of fossil fuels and other chemicals, and sunlight. While ozone concentrations can be high in communities with a lot of industry and freeways nearby, ozone is “not really so much a roadway problem; it’s more of what we call an ambient air pollutant,” Pruitt said. Ozone can travel far away from where it was produced, in other words.
There are some rules of thumb, though. The places with the highest emissions and most appropriate atmospheric conditions for ozone pollution are “increasingly the western U.S. and the Southwest,” Pruitt said. The top four worst cities for ozone on the 2024 State of the Air report by the ALA were all in California, led by Los Angeles and Long Beach.
Since the passage of the Clean Air Act in 1963, other regions of the country have been doing much better, including the Southeast, mid-Atlantic, and Northeast. (Bangor, Maine, had the cleanest air in the report.)
Because ozone is so strongly related to sunlight, it does not cause indoor air pollution to the same extent as wildfire smoke (which, if you’re keeping score, is a PM2.5 pollutant). “Because it’s so reactive, it gloms onto your furniture and your walls and stuff, once it gets inside,” Pruitt said of ozone. To protect yourself, you can just stay indoors and run your air conditioner.
But what if you want or need to go out? Because ozone is a gas rather than a particle, HEPA filters and face masks won’t protect you. Instead, Pruitt said that you can time your errands, tend to your garden, and exercise when the sunlight is the weakest — mornings, especially, tend to be less demanding on the lungs during ozone events.
The Clean Air Act of 1963 requires the Environmental Protection Agency to review the national ambient air quality standards for ozone (as well as several other pollutants) every five years. “It almost never actually does it every five years” though, Pruitt said. “Sometimes advocates have to sue them to get them to move things along.” The EPA completed its last review in December 2020, with the Trump administration maintaining the 70 parts per billion standard set in 2015. Attacks on the Clean Air Act would likely resume if Trump retakes office.
Aside from agitating for stricter clean air standards, there are measures you can take to protect others from ozone events. The simplest is not to contribute any more nitrogen oxides and volatile organic compounds to the environment than you otherwise have to when ozone levels are high. Avoid driving or idling your car; top off your tank during the coolest parts of the day, such as after dark; minimize your electricity use; and set your air conditioner no lower than 78 degrees.
In the long term, reducing ozone pollution will mean “choosing greener products for cleaning and personal care, so that we’re not producing volatile organic compounds,” Pruitt told me. The National Oceanic and Atmospheric Administration previously found that in New York City in 2018, “about half” of the ambient volatile organic compounds it measured were produced by people, not vehicle exhaust. (Here’s a guide to reducing VOCs from your rotation.)
Additionally, “transitioning to zero-emission technologies so we're not burning fossil fuels” will help limit ozone pollution, Pruitt said. The difference can be pretty significant: A study from the University of Houston published earlier this month found that by switching to electric vehicles, New York and Chicago could prevent 796 and 328 premature pollution-related deaths per month, respectively. Counterintuitively, the study found that more EVs on the roads could increase mortality in Los Angeles due to a corresponding increase in secondary organic aerosols caused by complicated dynamics between nitrogen oxides and volatile organic compounds and the city’s unique geography. “This underscores the need for region-specific environmental regulations,” the authors said.
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Here’s what stood out to former agency staffers.
The Department of Energy unveiled a long-awaited internal reorganization of the agency on Thursday, implementing sweeping changes that Secretary of Energy Chris Wright pitched as “aligning its operations to restore commonsense to energy policy, lower costs for American families and businesses.”
The two-paragraph press release, which linked to a PDF of the new organizational chart, offered little insight into what the changes mean. Indeed, two sources familiar with the rollout told me the agency hadn’t even held a town hall to explain the overhaul to staffers until sometime Friday. (Both sources spoke on condition of anonymity out of fear of reprisals.)
After conversations with multiple former agency staffers, including a senior political appointee who helped lead the Biden-era reorganization in 2022, here’s what stood out to me:
The spring 2022 overhaul Jennifer Granholm, former President Joe Biden’s secretary of energy, oversaw came with a detailed legal memo and extensive explanations about what the changes would mean.
“Overall, this seems sloppy,” the former senior staffer who led that process told me this morning. “If you’re trying to carry out a very coherent energy dominance strategy, you’d at least explain which boxes are moving where and what’s sitting under those boxes.”
Announcing the changes with so little detail, the former official said, “seems like a fundamental lack of leadership.”
“This, to me, just seems reckless,” the appointee continued. “People who are sitting within these offices don’t know where they’re going to work virtually on Monday.”
That, of course, may change by the end of today once the Energy Department holds its town hall meeting.
It’s unusual for an office at the agency to report directly to the secretary. Those that do typically straddle multiple types of responsibilities within the agency. For example, the Office of Technology Transitions reported directly to Granholm under the Biden administration because its purview fell under both research and deployment. The Office of Policy functions similarly. But the newly-created Office of Critical Minerals and Energy Innovation absorbed not only various mining-related sections of the agency, but also the now-defunct Office of Energy Efficiency and Renewable Energy. That puts a lot of money and grant-making powers under the new office.
Leading the Office of Critical Minerals and Energy Innovation will be Audrey Robertson, who was confirmed last month as the assistant secretary for the Office of Energy Efficiency and Renewable Energy. A former investment banker and oil executive, Robertson served on the board of directors of Wright’s former company, the fracking giant Liberty Energy, until earlier this year. Another agency source familiar with the organization said “it makes no sense for this office not to answer to an undersecretary of energy.”
“Audrey is Wright’s person,” the source told me.
That, the other former agency official told me, creates some political liabilities for Wright.
“For departmental oversight reasons, that’s a lot of grant-making money and authorities that typically you’d want to layer under additional oversight before it goes to the secretary,” the ex-official said. “This is the thing that sticks out like a sore thumb.”
All that said about the new Office of Critical Minerals and Energy Innovation, no one can blame Wright for wanting to consolidate some of the bureaucracy. One way to read the decision to eliminate certain offices, such as the Office of Manufacturing and Energy Supply Chains or the Office of State and Community Energy Programs, is that the new administration wanted to undo the changes made under its predecessor in 2022. While manufacturing work included a lot of what the U.S. is doing with batteries, funding for that work fell under the Office of Energy Efficiency and Renewable Energy in the 2021 Infrastructure Investment and Jobs Act.
“A lot of the moves that they’re doing to re-consolidate offices aligns with what was technically under the Bipartisan Infrastructure Law, which directed battery work to go through EERE,” one of the sources told me. “So some of this is realignment back to the original congressional direction.”
The stop-gap funding bill that reopened the government after the longest shutdown in history included a measure to prevent any dismissals until January 30.
But it’s unclear whether the agency plans to terminate workers as part of the reorganization starting in February.
In a sign that the Trump administration is taking efforts to commercialize fusion energy technology more seriously, the reorganization gives fusion its own office, moving the work out of the Office of Science.
“Overall this is a win for the private-fusion sector, and further cements a move from a discovery-based research model to milestone-driven, commercialization-focused policy,” Stuart Allen, the chief executive of the investment company FusionX Group, wrote in a post on LinkedIn. “All signs point to a federal strategy increasingly aligned and enmeshed with the rapid advancement of fusion energy.”
Under the new structure, geothermal and fossil fuels will live together under the new Hydrocarbons and Geothermal Energy Office.
There are some obvious synergies. The new generation of geothermal startups racing toward commercialization rely on drilling techniques such as fracking to tap into hot rocks in places that conventional companies couldn’t. Oil and gas companies are excited about the industry; Sage Geosystems, one of the big players, is led by the former head of Shell’s fracking division. And notably, most of the big companies, including Sage, Fervo Energy, and XGS Energy (whom I have written about twice recently in these pages) are all headquartered in Big Oil’s capital of Houston, Texas.
Nuclear power has long had its own office at the Energy Department, and that won’t change. But you’d think that the other source of clean baseload power that the Trump administration has anointed as one of its preferred generating sources might get slotted in with geothermal. Instead, however, hydropower is in Robertson’s mega-office.
Unsurprisingly, the bulk of the Energy Department’s work that deals with the nation’s nuclear arsenal was largely left untouched by the changes. Perhaps the agency had enough drama from the Department of Government Efficiency’s dismissals of critical workers in the early days of the administration, which led to an embarrassing effort to reverse the firings.
As was widely expected, the reorg killed the Biden-era Office of Clean Energy Demonstrations, which the new administration had already gutted. What becomes of key programs that office managed is still a mystery. Chief among them: the hydrogen hubs.
The Energy Department yanked funding for the two regional hubs on the West Coast last month, as Heatmap’s Emily Pontecorovo reported at the time. A leaked list that the administration has yet to confirm as real proposed defunding all seven of the hubs. It’s unclear whether that may happen. If it doesn’t, it’s unclear where those billions of dollars may go. The most obvious place is under Robertson’s portfolio, ballooning the budget under her control by billions.
When Wright announced the first totally new loan issued under the agency’s in-house lender earlier this week, he trumpeted his new approach the Loan Programs Office. He wanted to refashion the entity with its lending authority of nearly $400 billion as a source of funding primarily for the nuclear industry. The first big loan issued Tuesday afternoon went to utility giant Constellation to finance the restart of the functional reactor at the Three Mile Island nuclear station. But at a press conference last month, Wright hinted at the new branding, as Emily called in this piece. It’s now the Office of Energy Dominance Financing.
The new office isn’t just the LPO, however. The $2.5 billion Transmission Facility Financing Program will also fall under the new so-called EDF — an acronym it will aptly share with France’s biggest utility, which came under state control recently as part of Paris’ efforts to refurbish and expand the country’s vast nuclear fleet.
I’ll leave it to my source to level a critique at my colleagues in this industry:
“Even in The New York Times today there’s an article that says all these offices are eliminated,” one of the sources told me. “Their names were eliminated, but a lot of the projects for whatever remains that they haven’t terminated are just being reassigned.” The Wall Street Journal had a similar angle.
The actual thing to watch for, the source said, was how job descriptions change.
“What’s going to be more telling is when they have a new, updated mission of the Office of Electricity or a new, updated mission of the Office of Critical Minerals and Energy Innovation.”
The United Nations climate conference wants you to think it’s getting real. It’s not total B.S.
How to transition away from fossil fuels. How to measure adaptation. How to confront the gap between national climate plans and the Paris Agreement goals. How to mine critical minerals sustainably and fairly.
How to get things done — not just whether they should get done — was front and center at this year’s United Nations climate conference, a marked shift from the annual event’s proclivity for making broad promises to wrestling with some of the tougher realities of keeping global warming in check.
Friday is the last official day of the two-week gathering known as COP30, taking place on the edge of the Amazon rainforest in Belém, Brazil, although probably not the actual end of it. Despite early assurances from the Brazilian government that this year’s conference would finish on time, delegates are still hashing out a final decision text and are likely to keep at it until at least Saturday.
The Brazilian leadership and other COP veterans have framed this as an “implementation COP,” where parties to the Paris Agreement “move from pledges to action” and similar clichès. It’s certainly not the first time these words have been used at COP. The Paris Agreement itself was billed as “enhancing the implementation” of the UN Framework Convention on Climate Change, the foundational treaty underlying these annual negotiations.
“Action” may be a stretch to describe what ultimately happened this year. As is the case at every COP, the provision of finance, or lack thereof, from developed to developing countries dominated the discussion, preventing progress on other agenda items. “Climate finance just remains this ongoing obstacle,” Rachel Cleetus, a senior policy director for the Union of Concerned Scientists, told me. Global south countries and small island states argue they simply cannot increase their ambition, or work on adaptation, without finance. The conference’s repeated failure to come to terms with that is probably the biggest counterpoint to the idea that these meetings have become more grounded in reality.
It remains to be seen which, if any, of the efforts to work out the details of the transition will make it into the final agreement, but the success of these annual gatherings should not only be measured by what’s in the text.
Here are three key ways Belém has already pushed the conversation forward.
During a speech at the start of the conference, Brazil’s President Luiz Inácio Lula da Silva proclaimed that it is “impossible to discuss the energy transition without talking about critical minerals, essential to make batteries, solar panels, and energy systems.”
Never before had the negotiations broached the subject of all of the industrial earth-moving implicit in the fight against climate change. By the end of the first week, however, one of the working groups had released a draft text that acknowledged “the social and environmental risks associated with” extracting and processing critical minerals.
A later revision of the document added a note about “enabling fair access to opportunities and fair distribution of benefits of value addition,” a reference to breaking the pattern of rich countries extracting minerals cheaply from the Global South while keeping the more profitable processing and manufacturing of those minerals at home. (As of Friday morning, however, references to “critical minerals” were erased from the text.)
The text was released by the Just Transition Work Program, a newer workstream at the conference that was established at COP27 in Egypt. Outside of the critical minerals note, there was a larger push to get Just Transition program as a whole more grounded in reality. This area of the negotiations focuses on ensuring the goals of the Paris Agreement are achieved fairly and equitably, with recognition that the transition will happen at a different pace in different countries, with different implications for each one’s economy. It was primarily established as a forum for countries to exchange ideas and information, with biannual meetings.
At COP30, however, the G77, China, and many global south countries began pushing to turn it into more of an action-oriented group that guides the global transition and tracks progress using agreed-upon metrics.
The Just Transition mechanism is not to be confused with the much-talked-about roadmap to transition away from fossil fuels, although the two are closely tied.
Two years ago, the final agreement at COP28 in Dubai made history with the first-ever call for “transitioning away from fossil fuels in energy systems, in a just, orderly and equitable manner.” Last year, however, that edict was dropped, as negotiations over a new climate finance target took precedence. Now it’s been revived, with robust support from countries to build on the statement with a more fleshed-out plan. Phasing out fossil fuels has vastly different implications for different countries, some of whose economies are deeply dependent on revenue from their fossil resources. The roadmap would start to work through what it would really mean to coordinate the effort.
Once again, the message came from the top. “We need roadmaps that will enable humankind, in a fair and planned manner, to overcome its dependence on fossil fuels, halt and reverse deforestation, and mobilize resources to achieve these goals,” Brazil’s Silva said in a speech at the opening of the conference.
This past Tuesday, a coalition of a whopping 82 countries came out in support of this planning effort, pressing for it to be included in the final decision text. “This is a global coalition, with global north and global south countries coming together and saying with one voice: this is an issue which cannot be swept under the carpet,” Ed Miliband, the UK’s energy secretary, said during a press conference that day.
Several more countries have joined since, bringing the count to 88 — nearly half of the 195 parties to the Paris Agreement. The biggest fossil fuel emitters, such as China, India, and Saudi Arabia, are not on board, however. As of Friday morning, all mentions of fossil fuels, let alone a roadmap, have been scrubbed from the draft decision text. Still, the huge coalition backing the roadmap is a sign of a growing and potentially powerful consensus.
One of the big questions looming over this year’s conference was whether and how countries would address their utter failure to live up to the Paris Agreement’s goal to keep warming “well below 2°C above pre-industrial levels,” let alone the more ambitious target of 1.5 degrees.
A report issued by the United Nations Environment Program just before the talks began concluded that countries’ latest climate pledges, known as their “nationally determined contributions,” or NDCs, would put the planet on a path to warm at least 2.3 degrees by the end of the century. It also stated definitively that global average temperatures would exceed 1.5 degrees of warming.
This wasn’t news — scientists have previously concluded that exceeding 1.5 degrees is basically guaranteed. “But this is the first time we saw it so bluntly in the UN report,” Cleetus told me. “So that was a pretty sobering backdrop coming into this COP.”
All countries were supposed to submit updated NDCs this year that contained targets for 2035, but more than 70 have failed to do so, including India, one of the world’s biggest emitters.
Island states, backed by Latin American nations and the EU, wanted the conference to make some kind of declaration that countries’ current pledges are not sufficient and should be revised. The draft text issued this morning, while acknowledging the insufficiencies of NDCs, does not spell out the implications or required response as bluntly as many want to see.
It does, however, introduce an important new concept that could become a key part of the negotiations in the future. For the first time, the text references a resolve to “limit both the magnitude and duration of any temperature overshoot.” This not only acknowledges that it’s possible to bring temperatures back down after warming surpasses 1.5 degrees, but that the level at which temperatures peak, and the length of time we remain at that peak before the world begins to cool, are just as important. The statement implies the need for a much larger conversation about carbon removal that has been nearly absent from the annual COPs, but which scientists say that countries must have if they are serious about the Paris Agreement goals.
"If countries (or the UNFCCC) want to keep talking about reaching 1.5C, they need to embrace net-negative emissions, moving even beyond net-zero,” Oliver Geden, a senior fellow at the German Institute for International and Security Affairs, and an IPCC report author, told me. “If they don't want to do this, then talking about reaching 1.5°C is not credible anymore.”
Things in Sulphur Springs are getting weird.
Texas Attorney General Ken Paxton is trying to pressure a company into breaking a legal agreement for land conservation so a giant data center can be built on the property.
The Lone Star town of Sulphur Springs really wants to welcome data center developer MSB Global, striking a deal this year to bring several data centers with on-site power to the community. The influx of money to the community would be massive: the town would get at least $100 million in annual tax revenue, nearly three times its annual budget. Except there’s a big problem: The project site is on land gifted by a former coal mining company to Sulphur Springs expressly on the condition that it not be used for future energy generation. Part of the reason for this was that the lands were contaminated as a former mine site, and it was expected this property would turn into something like a housing development or public works project.
The mining company, Luminant, went bankrupt, resurfaced as a diversified energy company, and was acquired by power giant Vistra, which is refusing to budge on the terms of the land agreement. After sitting on Luminant’s land for years expecting it to be used for its intended purposes, the data center project’s sudden arrival appears to have really bothered Vistra, and with construction already underway, the company has gone as far as to send the town and the company a cease and desist.
This led Sulphur Springs to sue Vistra. According to a bevy of legal documents posted online by Jamie Mitchell, an activist fighting the data center, Sulphur Springs alleges that the terms of the agreement are void “for public policy,” claiming that land restrictions interfering with a municipality’s ability to provide “essential services” are invalid under prior court precedent in Texas. The lawsuit also claims that by holding the land for its own use, Vistra is violating state antitrust law by creating an “energy monopoly.” The energy company filed its own counterclaims, explicitly saying in a filing that Sulphur Springs was part of crafting this agreement and that “a deal is a deal.”
That’s where things get weird, because now Texas is investigating Luminant over the “energy monopoly” claim raised by the town. It’s hard not to see this as a pressure tactic to get the data center constructed.
In an amicus brief filed to the state court and posted online, Paxton’s office backs up the town’s claim that the land agreement against energy development violates the state’s antitrust law, the Texas Free Enterprise and Antitrust Act, contesting that the “at-issue restriction appears to be perpetual” and therefore illegally anti-competitive. The brief also urges the court not to dismiss the case before the state completes its investigation, which will undoubtedly lead to the release of numerous internal corporate documents.
“Sulphur Springs has alleged a pattern of restricting land with the potential for energy generation, with the effect of harming competition for energy generation generally, which would necessarily have the impact of increasing costs for both Sulphur Springs and Texas consumers generally,” the filing states. “Evaluating the competitive effects of Luminant’s deed restrictions as well as the harm to Texans generally is a fact-intensive matter that will require extensive discovery.”
The Texas attorney general’s office did not respond to multiple requests for comment on the matter. It’s worth noting that Paxton has officially entered the Republican Senate primary, challenging sitting U.S. Senator John Cornyn. Contrary to his position in this case, Paxton has positioned himself as a Big Tech antagonist and fought the state public utilities commission in pursuit of releasing data on the crypto mining industry’s energy use.