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Kamala Harris quickly rang up endorsements from Democratic elected officials and convention delegates Sunday afternoon after President Joe Biden ended his re-election campaign, making Vice President Harris the likeliest Democratic nominee for the presidency of the United States. Many of these plaudits came from figures in the climate policy space, but few were quite as vociferous as the one from Gina McCarthy, a director of the Environmental Protection Agency under President Obama and White House climate advisor under Biden.
“Vice President Harris would kick ass against Trump,” she said in a statement. “She has spent her whole life committed to justice, fighting for the underdog, and making sure that no one is above the law. She will fight every day for all Americans to have access to clean air, clean water, and a healthy environment.”
When Harris has had the chance to formulate climate action on her own — as the attorney general of California, as a U.S. senator, as a candidate for the Democratic presidential nomination in 2020 — it has tended to be aggressive in its timelines for decarbonization and heavily focused on the harms that fossil fuel extraction and processing inflict on marginalized communities.
As vice president, however, she has been subsumed into the rollout of both the Inflation Reduction Act and the Infrastructure Investment and Jobs Act. In some cases, the programs she’s pitched and praised have an organic connection to her own personal policy work — a grant program for electric school buses, for instance, the launch of which was the source of one of her more enduring Kamala-isms: “Who doesn’t love a yellow school bus?”
Assuming she wins the party’s nomination and then, finally, the White House, a Kamala Harris climate agenda would no doubt look much like Biden’s. To people who’ve been paying attention all along, however, there’s no reason to think she couldn’t push the country even more zealously toward decarbonizing.
For one, there’s the historical record. Harris not only endorsed Green New Deal legislation in 2019, she also put out a climate plan during her campaign that included $10 trillion of public and private spending and called for reaching net-zero by 2045, achieving a carbon neutral electric grid by 2030, no new fossil fuel leasing on public lands, and a carbon pollution fee. While expansive, Harris’s plan was not the work of someone like Jay Inslee, who has legislated on climate for years, or Bernie Sanders, who was willing to simply outbid his fellow candidates on progressive policy, but her climate policy was the process of consulting with climate activists. In fact, her team had reached out to Inslee’s after he dropped out for advice on climate, Jamal Raad, Inslee’s campaign communications director, told me.
“If we jump in the Wayback Machine, [Harris] was one of the most ambitious presidential candidates in the 2020 primary cycle,” Justin Guay, program director at Quadrature Climate Foundation, told me. “She had the largest proposed spending plan of any candidate not named Bernie. She promised a sum 10 times that of the greatest climate president we’ve ever had, Joe Biden.” Importantly, he added, she focused on “sticks, not just carrots,” including investigating and bringing lawsuits against fossil fuel companies, as she’d done in California. This, he said, is “red meat for the climate base.”
Where she did stand out in the Senate, on the campaign trail, and in the Biden administration was in her focus on environmental justice, an issue combining green politics and racial justice that she used to reach out to the party’s left wing. By the time the she was picked to be President Biden’s vice presidential nominee, she had won the praise of both the youth-led Sunrise Movement (which has since protested outside her Southern California home and notably withheld its support from Biden during his reelection campaign) and Evergreen Action, a climate policy group built by former Inslee staffers. “She made environmental justice central to her climate plans on the presidential campaign,” said Raad, an Evergreen Action cofounder.
In the summer of 2019, she joined up with Alexandria Ocasio-Cortez on a bill that would have required all climate-related legislation to undergo a review of its effect on “frontline communities,” those living adjacent to energy-related facilities, which tend to be disproportionately populated by poor people of color, and created offices of climate equity within the Congressional Budget Office and the Office of Management and Budget.
While this particular piece of legislation went nowhere, the motivating ideas have been all over the Biden-Harris White House’s policy agenda — in tax benefits directed toward projects in “energy communities;” in the Justice40 Initiative, which aims to direct 40% of climate and related spending to flow toward disadvantaged communities; and in the Greenhouse Gas Reduction Fund, a.k.a. “green banks,” aimed at making climate-friendly investing more affordable.
That’s all great, Raad told me. But he also added, “What’s more relevant has been how central she’s made climate in her vice presidency as one of her top priorities.” Harris reached out to Raad and others in the run-up to the IRA’s passage, he said. “She held a town hall. She barnstormed the country. As far as folks wanting further momentum in the next presidency, that’s the more relevant development — that she wanted to be associated with climate action.”
Whatever her policy priorities as president, they would have to fit between the lines of what would be, at best, narrow majorities in both chambers of Congress, limited by the filibuster and reconciliation process, along with large policy shifts that any new administration will have to deal with, such as the expiration of key portions of the 2017 Tax Cuts and Jobs Act in 2025. It will be a far distance from the heady days of the 2020 Democratic primary campaign, when Harris eagerly participated in a bidding war between the candidates for the most aggressive and expansive climate program — less Frank Capra, more Alan J. Pakula.
“The reality is that the climate movement should focus as much, if not more, on creating the conditions that force politicians to act on climate as we do pushing for candidates with a hawkish climate policy platform to begin with,” Guay told me. “That was the greatest lesson from the Joe Biden era. He was no climate hawk when he entered the 2020 primaries,” but thanks to decades of unrelenting pressure and calls for more policy ambition, “he emerged the most powerful climate president we’ve ever had.”
Raad, too, emphasized the importance of realpolitik at this point in history. Having a president willing to put herself on the line for climate policy is important — “even if we don’t get major legislation done,” he told me. “We need to make sure the IRA is implemented effectively in the fullest way possible. We need a very careful eye towards writing regulations that are as effective as possible so they’re not getting overturned by Federalist Society judges.” Getting money out the door will be key, he said, “and that’s why we need an advocate in the White House.”
With assistance from Jeva Lange and Robinson Meyer.
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Current conditions: Oman’s Ayn Athum Waterfalls burst to life this week as rain battered the Gulf nation’s southwestern Dhofar governorate • Severe monsoon flooding has deluged parts of the American Southwest, including Navajo Nation, where at least three people have died • Tropical Storm Dujuan is barreling toward Japan, where it threatens flooding and landslides in Tokyo and Chiba.
When the Houthis stormed Yemen’s Red Sea coast last week, the Iran-backed rebels gained new ground from which to attack boats passing through the vital shipping lane, extending Tehran’s reach from the Persian Gulf’s hotly contested Strait of Hormuz to the waterway on the opposite side of the Arabian peninsula. In response, oil prices surged. But the price per barrel of crude is slipping again as the United States has rebuked Saudi Arabia’s requests for help routing the militants, instead seeking a deal that keeps the Bab al-Mandab Strait open to American and Israeli ships. Over the weekend, U.S. diplomats met with Houthi officials in neutral Oman, Reuters reported. Following the talks, the Times of Israel reported that Houthis promised not to attack any Israeli or commercial ships of any kind, only those linked to Saudi Arabia, which has funded the Yemeni government’s campaign against the rebels.
Satellite images published by the investigative site Hunterbrook showed workers building a bypass on Saudi Arabia’s East-West Pipeline, its main conduit for circumventing oil exports around the Strait of Hormuz, to get around the pumping station damaged by a Houthi attack. But the promise of free movement through the Red Sea sent the price of oil down by between 1% and 4% on Thursday.
Just yesterday, I told you that the Trump administration had moved to drastically change how the government interprets the Endangered Species Act to only consider deaths of protected animals illegal if the creatures were intentionally targeted. Such a shift would exclude the vast majority of deaths linked to energy companies, such as when birds land in toxic oil ponds or collide with wind turbines. Whether federal enforcement ultimately reflects that interpretation depends on the outcome of a forthcoming lawsuit. Already, Earthjustice has vowed to file litigation challenging the Trump administration’s legal memo directing federal agencies on its new view of the nation’s bedrock conservation law. “The government’s new legal position is a prescription for extinction. It says that as long as you claim you didn’t mean to kill an endangered species, the law can’t and won’t stop you,” Earthjustice attorney Ben Levitan said in a press release. “That’s ridiculous — and a totally illegal, active misreading of the Endangered Species Act. We’ll see the Trump administration in court about this.”
The toll wind turbines take on migratory birds is a favorite talking point of the energy source’s opponents. But relief from the responsibility to avoid killing birds would be cold comfort to the wind industry as developers wait for the Trump administration to follow a court ruling requiring it to continue processing applications for turbines. As my colleague Jael Holzman wrote yesterday, the administration has continued delaying. At least one other legal fight within the offshore wind industry has, meanwhile, come to a conclusion. Vineyard Wind and its turbine supplier GE Vernova, announced an “amicable settlement” this week that resolves “all outstanding litigation,” the New Bedford Light reported. The developer sued the supplier in April, accusing GE Vernova of an $800 million breach of contract following a blade failure in 2024.

The U.S. needs more long-term energy storage, and few technologies are better tested by time than using excess electricity to pump water into a reservoir, where it can be released downhill and run through turbines to generate huge bursts of power when it’s needed. Back when the U.S. had lots of nuclear power, pumped hydro plants harvested the unused electrons during the night. With solar now producing more electricity during the day in some parts of the country than the grid demands, pumped hydro is seeing a potential renewal. But the U.S. hasn’t built any pumped hydro facilities since the 1990s. A project that looked likely to break that dry spell is now on pause as the Trump administration heeds opponents’ concerns and orders a new study on its environmental impact.
The Federal Energy Regulatory Commission has delayed its decision on whether to license the $3 billion project to add a pumped hydro facility to the Seminoe Reservoir, a lightning bolt-shaped waterway in southern Wyoming. The Bureau of Land Management said it will conduct a supplemental environmental impact statement and open the door to more public comments and input from local officials. “This feels like a small victory,” CiCi Oliver, a fly-fishing shop owner who opposed the project over its potential disruptions to the ecology of the reservoir, told WyoFile this week.
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At the start of the Iran War, some interpreters of President Donald Trump’s supposed four-dimensional geopolitical chess moves suggested that shutting down the Strait of Hormuz was an intentional move to show China’s vulnerable underbelly: Beijing’s dependence on oil imports. And yet, China’s vast oil stockpiles and refining capacity, plus its array of alternative energy sources, allowed the country to slash oil purchases by 23% in the first six months of the war compared to the same period last year, according to a New York Times analysis of customs data. “This is a power that nobody thought China had,” said Erica Downs, a senior research scholar at Columbia University’s Center on Global Energy Policy. “Going forward, it’s going to be really interesting to see: What does China do with this newfound power?” The heaviest answer to that question now weighing on Western officials involves China considering the ramifications of a potential invasion of Taiwan to be less worrying than before.
That’s especially true because Taiwan, by contrast, is more vulnerable to losing access to oil and gas imports than ever before. After completing its decades-long mission last year to shut down the nuclear fleet that powered the island’s 20th century transformation into the world’s premiere chipmaker, Taiwan’s ruling Democratic Progressive Party — which advocates for the republic’s continued de facto independence — left the nation dependent on imported liquified natural gas and crude for the vast majority of its energy. Now, according to Nikkei, the government is hastening its efforts to potentially bring at least one nuclear station back online.
Yet another state is considering a moratorium on data centers — one close to the epicenter of the artificial intelligence boom. Maryland, which shares a grid and a border with northern Virginia’s data center megacluster, could see a ban come into effect as early as next year if state legislators pass a bill in the next session. Governor Wes Moore, a Democrat, said he “will absolutely sign” a statewide ban “if it’s coming from local legislators.” Speaking to Punchbowl News, he suggested that any moratorium would come with loopholes for projects that meet high standards. “I believe local jurisdictions should have a say. There are certain local jurisdictions who want it,” he said. “I just need them to understand I have very strict guidelines for what is actually going to get state approval.”
A startup founded by members of the team of U.S. government scientists that first achieved net-energy gain from a fusion reaction has hit a new milestone that should raise the eyebrows of even skeptics of the so-called holy grail of clean power. Less than two months after publicizing its roadmap to commercial fusion, Inertia Enterprises ran a simulation demonstrating that its first commercial plant will be capable of producing 25 times more energy than the laser needed to trigger the reaction, the company told my colleague Katie Brigham in an exclusive.
The company using the only technology proven to achieve breakeven has simulated net energy gain.
Less than two months after publicizing its roadmap to commercial fusion, Inertia Enterprises has checked step one off its list. The startup ran a simulation demonstrating that its first commercial facility will be capable of producing over 25 times more fusion energy than the laser energy put into it, Inertia told Heatmap exclusively.
This is actually the second milestone Inertia has achieved on its 10-point roadmap to building a grid-scale power plant by the mid-2030s — the startup announced last month that it had cut the manufacturing time for its fusion fuel pellets from days to minutes. But for the lay fusion observer, this latest achievement may be the more striking of the two. So far, the only entity to achieve breakeven — the point at which a fusion reaction produces more energy than it consumes — is Lawrence Livermore National Lab’s National Ignition Facility.
Inertia, founded last year by current and former Lawrence Livermore scientists, is now building on that result under a formal research partnership with the lab, using the same technical approach as NIF: firing high-powered lasers at a tiny pellet of fusion fuel, compressing it until the nuclei fuse and release enormous amounts of energy.
The new results, which Inertia said it’s submitting for peer review, demonstrate that the company’s first commercial-scale plant ought to generate over 250 megawatts of electricity for the grid. But because the startup’s machine has yet to be built, the projected energy gain and power output come from a so-called “virtual shot,” a high-fidelity computer simulation that uses the same design codes Lawrence Livermore has used for its own successful ignition experiments, and is thus calibrated and benchmarked against real results.
“We are simulating all the things that we know happen in a fusion experiment, and it’s using the validated models — the best, highest-fidelity physics models that have been validated to NIF ignition experiments — to project where we will be with Inertia,” the startup’s co-founder, Annie Kritcher, told me. The simulation accounts for factors such as “target defects, variations in laser performance, laser delivery, [and] injection tolerances,” she explained.
Even when variables like these fluctuate, Kritcher said, the machine’s energy yield should barely change. That sets Inertia’s system apart from NIF’s, which operates right on the so-called “ignition cliff,” where small imperfections in the fusion fuel target or slight variations in laser performance can determine whether the system achieves ignition at all. But because Inertia designed its system to operate far above that threshold, minor flaws should translate only to modest dips in performance.
Other fusion startups have run simulations demonstrating the validity of their underlying physics and — in industry leader Commonwealth Fusion Systems’ case — even projecting their ability to exceed breakeven. But Kritcher argues that Inertia’s “virtual shot” is a more meaningful achievement because the startup’s plant design replicates the underlying physics validated by NIF, the only fusion experiment yet to cross breakeven in the real world. “The extrapolation risk for the other validation simulations is much, much, much higher,” she told me.
Kritcher has experienced this risk firsthand during her many years running experiments at NIF. When the facility fired its first real shots at ignition in 2011, she was working as a post-doctoral researcher at the national lab, and sincerely believed these early experiments would be a success. But the shots turned out to be “orders of magnitude off” from achieving their goal, thanks to the “unknown unknowns and the physics that weren’t included” in the team’s initial modeling.
Other companies that haven’t yet proven their physics on a real-world machine still face those “unknown unknowns,” she explained, whereas Inertia has been able to unveil and eliminate as many as anyone has yet found. The startup’s plant design is by no means an exact replica of NIF, however. For starters, its fusion targets will be twice as large, and its lasers roughly five times as powerful. The facility will also fire 10 shots per second, compared with NIF’s roughly one shot per week, using thousands of individually adjustable laser beams rather than NIF’s fixed 192. So as is nearly always the case when scaling up, some unknown unknowns likely remain.
But Kritcher is confident that the virtual shot will translate to real world performance — a level of certainty she admittedly hasn’t always had in her decades of nuclear engineering research and practice. In addition to her role at Inertia, Kritcher remains a senior scientist at Lawrence Livermore, where she has led the physics design for NIF’s fusion energy experiments since 2019.
A few years before the lab ultimately achieved breakeven in 2022 — more than a decade after its first attempts — Kritcher was beginning to doubt that they would ever get there. Then, in 2021, NIF reached a breakthrough that went largely unnoticed outside the ranks of dedicated fusion observers: It fired a shot that produced 70% as much fusion energy as the reaction consumed, bringing the facility within striking distance of net energy gain. And while it didn’t reach that threshold, the scientists said the experiment demonstrated ignition — a self-sustaining fusion burn.
The result gave Kritcher assurance that the lab was on the cusp of energy gain. Now, she feels a similar level of confidence that Inertia can translate its simulated 25x energy gain into a real world commercial facility. “The change that we made going from that first ignition result — the 0.7x gain to the [net energy] gain result — that’s the kind of change I feel like we’re making here,” she told me. “It’s working now, and we’re just making it bigger and better.”
Greenhouse gas pollution could drop by half a percent this year, according to a new analysis.
This is an edition of Heatmap Daily, an evening review of the day’s news written by our executive editor. Sign up for it here.
Back in March of last year, I coined the phrase “Degrowth Donald” to describe President Donald Trump’s accidental environmental impact.
Trump might say that climate change was a “hoax” or “scam,” I said. But when you looked at his actions, a different set of beliefs emerged.
He imposed a 10% tax on Canadian oil — a far more effective deterrent on consuming Albertan crude than a decade of protests against Keystone XL. He taxed foreign car imports and levied new tariffs on single-family-home building materials. You could say he had, I don’t know, rhubarb politics — a MAGA red stalk erupting in big green leaves.
Of course, Trump’s actual environmental politics are far more complicated. He has declared war on wind energy and gutted greenhouse gas rules. As you read in Heatmap AM this morning, the Trump administration announced today it would transform the Endangered Species Act to legalize a much broader range of animal killings.
But every so often, Degrowth Donald rides again. And so it is with the Iran war, which has gone on much longer than Trump initially envisioned, changed the global energy economy, and made China’s distinctive approach to energy security — which relies on electrification and large oil and mineral stockpiles — look more popular globally. It has triggered an energy crisis that is, at the moment, getting worse: Even in the United States, gasoline prices are surging again, and diesel is nearing its post-2022 inflation-adjusted record highs, according to Patrick De Haan, the head of petroleum analysis at GasBuddy. Energy prices are even higher in much of Europe.
One upshot of these higher prices, though? Emissions now seem to be going down. According to a new analysis from Carbon Brief, a U.K.-based nonprofit, global emissions from fossil fuels will fall by half a percent this year because of higher oil and natural gas prices caused by the Iran war and Strait of Hormuz closure. What’s interesting is that coal burning will actually increase — by more than 1% — but it will be swamped by declines from oil and gas consumption.
That’s a change from what authorities once expected. Last year, the International Energy Agency projected that global coal use would decline this year because of Chinese policies. But fuel switching will drive it up.
Of course, emissions declines caused by higher prices (or economic downturns) are the worst type of reductions. What we want to see, instead, is countries switching to lower-carbon forms of energy. But energy crises have a way of pushing every country’s energy policy in new directions. This year’s events have convinced Thailand, for instance, to reduce its liquified natural gas consumption and switch to renewables instead; they have caused Canada to open its market up to cheap Chinese electric vehicles and pursue an “associate membership” with the European Union. The 1970s oil crisis ultimately created the global energy regime of the 1980s and 1990s. What else countries might learn from this crisis is not too hard to guess.