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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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The Iran war has been a gift to the country’s vehicle, solar, and battery business.
This is Heatmap Daily, a weekday evening digest written by our executive editor.
Happy Monday and welcome back. For months now, we’ve been talking about how the U.S. and Israel’s war in Iran has been a boon for electric vehicles, clean energy, and (unfortunately) coal.
But today we got data that confirms: This clean energy export boom is not just a side story. It is one of the brighter spots in the overall Chinese economy, which remains the world’s second largest.
According to economic data released on Monday, China grew 4.5% during the summer quarter as compared to the quarter from a year earlier. That means the country will likely hit its growth target this year, albeit on the low end.
The country’s economic expansion wasn’t driven by domestic consumption, however. Consumer confidence remains low, and residential investment has yet to return after the property crash earlier this decade.
Instead, booming exports are now driving China’s economy. Exports were more than 36% higher in September than a year earlier, driven by chips, ships, electric vehicles, and solar panels and batteries. The country will likely record its biggest trade surplus ever this year.
Some of those categories are clearly flourishing thanks to the global AI boom — think chips and even batteries. But the preponderance of vehicle exports suggests surging oil prices aren’t hurting. Sales of ‘new energy vehicles,’ a category that includes 100% electric vehicles and plug-in hybrids, were up more than 13% on a year-over-year basis in September, according to the Chinese car manufacturer’s trade group. But exports of these vehicles are booming. Battery electric vehicles were up 130% last month compared to the same period in 2025, and plug-in hybrid exports were up more than 200%.
It’s interesting to consider how much the Chinese and U.S. economy are mirroring each other at this moment. Americans are dealing with a remarkable investment boom, which is buoying the labor market and stubbornly maintaining high inflationary pressure. China is struggling with deflation, and exports are its quickest path to growth. (Consumer sentiment in both countries, interestingly, seems to be in the doldrums, even though American consumers appear to be in much better shape.)
When thinking about what artificial intelligence could do for the United States over the next decade, some subject-matter prognosticators (and even some Anthropic employees) imagine a world of 4%, 5%, or even 7% GDP growth. Such a growth rate is difficult even to envision in the modern era, of course, and it seems like it could propel the U.S. economy to staggering prosperity.
I know better than to make a prediction about where we’re headed. But amateur economic commentators should keep China in mind, too: a country that dominates along many technological axes, but where the standard economic math of supply, demand, and consumer sentiment still holds. Except if the United States economy were to stumble, no exterior source of demand will come to our rescue.
Endurance Energy hoped its generator would run for a full year, but the team isn’t afraid of the “error” in “trial and error.”
About 300 miles off the Oregon coast, a mile beneath the ocean’s surface, a startup just drilled the world’s first subsea geothermal well. And for a grand total of exactly 8.7 seconds, its prototype power plant generated about 2 kilowatts of net power. It wasn’t quite the result the Seattle-based Endurance Energy was hoping for — the company’s goal was to run its 100-kilowatt generator for a full year. But it’s not nothing.
“We really proved with this mission that a geothermal well could be drilled and completed on the seafloor, and doing that within 21 months of the company existing I think is really a testament to our pace of progress,” Endurance CEO Andrew Redd told me.
A former SpaceX engineer — as so many climate tech founders seem to be — Redd appears quite comfortable with the rapid trial-and-error cycles that hard tech startups often demand. Or as he stated in the company’s press release, which provides a refreshingly frank account of what this first test did and didn’t accomplish, “We follow the adage ‘make it exist, then make it good.’”
Investors seem to be buying it. In June, the startup raised a $54 million Series A, led by Peter Thiel’s Founders Fund — Endurance’s second funding round in less than two years of existence. Still, the team certainly has their work cut out for them. The ocean is a notoriously difficult operating environment: Saltwater is corrosive and offshore infrastructure is difficult and expensive to build, maintain, and repair.
Indeed, Endurance spent the first 11 days of its three-week stint at sea debugging its drill, which the team had never operated underwater before. But with a vessel chartered and a locked-in deployment date, the company couldn’t afford to wait for everything to work out perfectly. “We were still working on that generator hours before it got on the seafloor,” Redd told me. He’s used to that sort of thing, though, comparing it to making final tweaks to rockets already sitting on the launchpad. “That’s kind of the name of the game,” he said.
The trial took place at Axial Seamount, an active underwater volcano and the only place in the world with a cluster of hydrothermal vents connected to shore by fiber optic cable, which allows the Endurance team to monitor and control its system in real time from Seattle. While this was the company’s fifth deep-sea mission, it was the team’s first attempt to actually drill their own well.
After lowering their drill about a mile below the surface, the team bored two holes and turned the second into a well about 2 inches wide, lining it with pipe and sealing it with cement. But after losing so much time to debugging, the team only managed to drill about 52 feet deep — far short of its original 200-foot target.
Water then flowed up the well at about 260 degrees Celsius (around 500 degrees Fahrenheit), but the narrow borehole proved too restrictive to deliver enough heat for the generator to operate. So the team pivoted, connecting the generator directly to a naturally flowing, hotter hydrothermal vent instead. The generator then ran for a total of 29 seconds, producing about 2 kilowatts of net power for 8.7 seconds. That represents the total electricity the turbine generated, minus the 7 to 8 kilowatts needed to run its supporting components, such as the refrigerant pump and other onboard equipment.
Then a software glitch triggered the onboard battery safety system, which shut down the plant. When the team tried to restart the system, the power cable feeding the refrigerant pump failed, leaving the pump unable to restart. That was the end of the road. The mission wrapped up after three weeks at sea, a far shorter run than the team had hoped.
“The success criteria would be if we had left with the generator still on the seafloor; that would have been an example of sustained net power, and we didn’t get there,” Redd told me. Instead, the team brought the system back to Endurance’s Seattle headquarters, where it’s fixing the software as well as refurbishing and upgrading the hardware — which includes changing how it builds and tests subsea cables — to prepare for another mission sometime this winter. This time, the goal will be to generate sustained power from a much deeper well.
The team will need to demonstrate progress soon to keep its next major milestone on track: a planned 2-megawatt deployment off the coast of Tonga by the end of 2027. The project aims to supply electricity directly to the Tongan grid, which today is heavily dependent on expensive, imported diesel. Redd expects subsea geothermal to be cost-competitive with that fuel in this first pilot.
Getting there, however, is a formidable engineering challenge. While it’s long been a subject of academic curiosity, no one prior to Endurance had ever drilled an offshore geothermal well before, meaning the team can’t simply transplant existing land-based technology to the seafloor. “Every component that you would use terrestrially now needs to be either modified or built completely from scratch,” Redd explained. “And so you multiply that across every component required to make these kinds of infrastructure projects happen, and it’s a lot of work.”
No kidding. But if Endurance can pull it off, Redd sees this resource as “the perfect energy source for the future.” A conference paper presented by the geoscience company Viridien last year estimates that offshore geothermal resources worldwide could yield about 6 terawatts of recoverable electric power — nearly twice the world’s current continuous electricity output.
“We can access terawatts of power. There’s no fuel. We can site next to extremely large cities around the Pacific. We have no surface presence,” Redd said, ticking off the advantages. Plus, the three necessary ingredients for a high-quality geothermal well — permeable rock, high heat, and water — are widely accessible offshore, he added. Eventually, he expects subsea geothermal to undercut natural gas in Endurance’s target markets: electricity grids, industrial facilities, and data centers across the Pacific Islands, the U.S. West Coast, and Northeast Asia, all of which sit along the undersea volcanic zone known as the “Ring of Fire.”
The way Redd sees it, advances in subsea technology pioneered by the offshore wind, oil, and gas industries have cleared much of the technological path to making underwater geothermal a viable clean energy resource. In his view, what’s been missing is simply the ambition to chase the opportunity in the private market. SpaceX, he said, really proved what’s possible for a scrappy startup to achieve.
“It is quite new at industrial scale for a small company with a bunch of fairly young people to go after something like this,” he told me. “Before SpaceX went to launch a rocket as a private company, no one thought you could get to orbit as a private company. And so that has really seeded this ambition.”
On Greenland’s deepsea mining ban, Indonesia floating nuclear, and a solar boom
Current conditions: Hurricane Trudy has weakened from its peak as a Category 2 storm but still threatens up to 8 inches of rain as it swirls off Baja California • A nor’easter is howling through the Mid-Atlantic this week, hammering the coast with winds of up to 70 miles per hour • A humid overcast has settled over Paris this week as French authorities struggle to regain control after protests over living costs gave way to anarchic riots.
At least 47 major data center projects have been delayed, withdrawn, or blocked so far this year, according to data the regulatory intelligence service RegLayer shared with the Financial Times — and that may be a “conservative estimate.” Just 35% of planned data centers are “credible,” analysts told the newspaper, as more than 1,000 communities across the United States now have restrictions on artificial intelligence infrastructure. The data comes as investors look increasingly jittery about AI following ChatGPT-maker OpenAI’s missing a key revenue metric this year.
Those findings stand in contrast with the numbers from our data service, Heatmap Pro. Based on our research, at least 107 projects faced cancellation so far this year, putting 2026 on track to beat last year, which saw 108 proposals nixed.
Unless you’re living off the grid and away from any social media (if so, I’m jealous), then you can probably surmise that not-in-my-backyard opposition prevails in many such cases against proposed data centers. That makes selling would-be neighbors on the projects critical. New polling by the advocacy group GoodPower found that a binding promise to protect local electricity rates boosts support for the projects upward by as much as 14 points. Such a pledge worked primarily on the 78% of voters who distrust data centers. Another potential winner: Pair a data center with renewables. At least 46% of respondents to the poll said their support would increase if a project were powered by renewables. The survey spoke to 2,610 registered voters last month and oversampled in states with at least 200 data centers completed: Arizona, Georgia, Indiana, Pennsylvania, Texas, and Virginia.
Greenland wants to find ways to exploit its mineral riches in hopes of generating enough income from industries other than fishing and tourism to eventually wean off subsidies from the governments of Denmark and the European Union. Earlier this month, as you may recall, the self-governing Danish island gave a project the green light. But the government in Nuuk doesn’t want miners harvesting metals from the seabed surrounding the Arctic island, which are fertile fishing grounds and could, in theory, lead to mineral production without meaningful infrastructure to create jobs for Greenlandic people. Last week, the Greenlandic Parliament adopted a resolution requiring the government to draft legislation banning deep-sea mining. All members present voted to approve the proposal, according to Sermitsiaq, a leading newspaper in Nuuk. The ban would, if adopted, last until the end of 2029, with the possibility of an extension for two years at a time.
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Long before the race for small modular reactors kicked off, Russia launched a floating nuclear power station and sailed the vessel up to the Arctic to power a small town. Now, as you may recall, the state-owned Russian nuclear company Rosatom is making plans to build more floating nuclear plants, and it has a major nuclear newcomer nation as an offtaker. Last week, NucNet reported, Rosatom announced a deal with Indonesia’s state-owned PT Pembangkit Listrik Nuklir to supply electricity to northern Indonesia from at least two floating nuclear plants with a capacity of 200 megawatts each.

Over the past decade, small-scale and rooftop solar systems increased from 18,812 gigawatt-hours to 92,979 gigawatt-hours, an increase of over 394%. That’s according to a new analysis from the Energy Information Administration, which found that California, Arizona, Texas, Florida are the regions with the most abundant solar resources. Even though the state has worse solar resources in general, New York ranked fifth as a result of growing capacity. Still, the rate of growth in generation has slowed over the past three years. l
The Trump administration is pulling out all the stops for Alaskans who want to drill and transport fossil fuels, mine minerals, and log trees. Now he’s easing rules on hunters. A new final rule from the National Park Service has revived a hunting method the Biden administration banned in 2024: Baiting bears with doughnuts soaked in bacon grease. Hunters use the baits to lure bears to close range before shooting them. “Some hunters prefer to use strong-smelling, high-calorie foods like pastries, doughnuts, meat scraps or fish remains to lure bears from miles away,” The New York Times reported. “But some conservationists say the practice is unethical and risks making the bears accustomed to human food, which could endanger people.”