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Three Mile Island Is Coming Back Online to Power Microsoft Data Centers

On major nuclear news, the Doomsday Glacier, and Canada’s emissions

Three Mile Island Is Coming Back Online to Power Microsoft Data Centers
Heatmap Illustration/Getty Images

Current conditions: Cleanup efforts have begun in Italy’s washed out Emilia-Romagna region • Endangered freshwater dolphins are washing ashore at Brazil’s Lake Tefe as water levels recede due to drought • The Colorado Rockies could see some snow this weekend.

THE TOP FIVE

1. Three Mile Island nuclear plant to come back online to power Microsoft data centers

We’ll start with some breaking news today: Pennsylvania’s Three Mile Island nuclear plant, the site of an infamous 1979 partial reactor meltdown, will be revived by 2028 as part of a plan to provide power for Microsoft’s data centers. Constellation Energy, the plant’s owner and the largest nuclear operator in the country, announced the news today. Microsoft agreed to buy all of the plant’s power for 20 years – enough energy to power 800,000 homes.

If approved, this decision “would mark a bold advance in the tech industry’s quest to find enough electric power to support its boom in artificial intelligence,” The Washington Post reported. “The symbolism is enormous,” Joseph Dominguez, chief executive of Constellation, told The New York Times. “This was the site of the industry’s greatest failure, and now it can be a place of rebirth.”

“Now, THIS is additional clean supply,” said Heatmap Shift Key co-host Jesse Jenkins. “Bravo. It is remarkable to see a handful of nuclear reactors shuttered in the last decade due to poor revenues contemplating restart now. Palisades, now TMI. Who is next? Maybe it was unwise to let these plants close in the fist place eh?”

2. World Bank climate financing reaches record high

The World Bank Group yesterday announced it delivered a record $42.6 billion in climate finance in fiscal year 2024 (which ran from July to June), a 10% increase year-over-year. Climate financing made up 44% of the group’s total lending, which is awfully close to its goal, set at COP28, of 45% for fiscal year 2025. However this remains “well short of the trillions of dollars in additional resources needed annually to finance the clean energy transition in emerging markets and developing countries,” noted Reuters.

3. Equatic starts producing its breakthrough anode

Carbon removal startup Equatic announced it has started manufacturing its “oxygen-selective anode,” which has the potential to pave the way for a two-for-one climate solution: commercial hydrogen production and carbon removal. Equatic wants to use seawater electrolysis – sending an electrical current through seawater – to sequester carbon dioxide from the air in the ocean while also producing hydrogen. But as Heatmap’s Emily Pontecorvo reported, electrolysis tends to turn the salt in the water into the toxic and corrosive gas chlorine, which makes commercializing such a process challenging. So Equatic set out to find the right combination of catalysts to make an anode – a sheet of conductive, positively-charged metal – that, when used in electrolysis, would screen out the salt and not allow it to react. Using ARPA-E funding, they landed on a design that produced less than one part per million of chlorine (lower than the amount in drinking water) and performed reliably for more than 20,000 hours of testing.

The company’s San Francisco facility will be able to produce 4,000 of these anodes per year to start, and is expected to operate at full capacity by the end of 2024. It will produce the anodes for Equatic’s first demonstration-scale project, a new plant in Singapore designed to remove 10 metric tons of CO2 and produce 300 kilograms of hydrogen per day — 100 times larger than the pilot version. Equatic also has plans to build an even bigger plant in Quebec that can remove 300 tons per day. That’s about three times the capacity of Climeworks’ Mammoth plant, the world’s largest direct air capture plant operating today.

4. Outlook for Doomsday Glacier looking ‘grim’

Scientists who spent six years examining the Thwaites Glacier in Antarctica warned this week that the outlook for the glacier is “grim.” Thwaites, often referred to as the “Doomsday Glacier,” is massive, spanning an area equal to the state of Florida. It has been retreating for nearly a century, but this melting has accelerated significantly over the last 30 years and the new research suggests it is set to worsen. Within 200 years, the glacier could collapse, raising sea levels worldwide. CNN succinctly summarized why this matters:

“Thwaites holds enough water to increase sea levels by more than 2 feet. But because it also acts like a cork, holding back the vast Antarctic ice sheet, its collapse could ultimately lead to around 10 feet of sea level rise, devastating coastal communities from Miami and London to Bangladesh and the Pacific Islands.”

Dr. Ted Scambos, U.S. science coordinator of the International Thwaites Glacier Collaboration and glaciologist at the University of Colorado, said “immediate and sustained climate intervention will have a positive effect, but a delayed one.”

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5. WRI considers city life at 3 degrees Celsius of warming

A sweeping new report from the World Resources Institute paints a bleak picture of what 996 of the world’s biggest cities will feel like in a world that is 1.5 degrees Celsius warmer than pre-industrial records, and compares that to a scenario in which temperatures warm by 3 degrees Celsius. Here are some stats:

  • 6.4 – heat waves, on average, cities will experience each year with 3 degrees C of warming, compared to 4.9 heat waves annually at 1.5 degrees C of warming.
  • 24.5 – average length, in days, of the year’s longest heat wave at 3 degrees C of warming, compared to 16.3 days for 1.5 degrees C of warming.
  • 16 – percentage of big cities that would experience a heat wave that lasts for a month or longer annually at 3 degrees C of warming.
  • Two-thirds – the share of the global population that will live in cities by 2050.

The report also looks at what warmer temperatures mean for mosquito-borne diseases. Some, like dengue, Zika, and West Nile, will become more common. But malaria could actually decline “as temperatures in many places become warmer than what is optimal for malaria-transmitting mosquitos.”

THE KICKER

Canada’s carbon emissions dropped last year for the first time since the pandemic, falling 0.8% between 2022 and 2023.

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Climate Tech

Climate Tech Pivots to Europe

With policy chaos and disappearing subsidies in the U.S., suddenly the continent is looking like a great place to build.

A suitcase full of clean energy.
Heatmap Illustration/Getty Images

Europe has long outpaced the U.S. in setting ambitious climate targets. Since the late 2000s, EU member states have enacted both a continent-wide carbon pricing scheme as well as legally binding renewable energy goals — measures that have grown increasingly ambitious over time and now extend across most sectors of the economy.

So of course domestic climate tech companies facing funding and regulatory struggles are now looking to the EU to deploy some of their first projects. “This is about money,” Po Bronson, a managing director at the deep tech venture firm SOSV told me. “This is about lifelines. It’s about where you can build.” Last year, Bronson launched a new Ireland-based fund to support advanced biomanufacturing and decarbonization startups open to co-locating in the country as they scale into the European market. Thus far, the fund has invested in companies working to make emissions-free fertilizers, sustainable aviation fuel, and biofuel for heavy industry.

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On New York’s gas, Southwest power lines, and a solar bankruptcy

COP30.
Heatmap Illustration/Getty Images

Current conditions: The Philippines is facing yet another deadly cyclone as Super Typhoon Fung-wong makes landfall just days after Typhoon Kalmaegi • Northern Great Lakes states are preparing for as much as six inches of snow • Heavy rainfall is triggering flash floods in Uganda.


THE TOP FIVE

1. UN climate talks officially kick off

The United Nations’ annual climate conference officially started in Belém, Brazil, just a few hours ago. The 30th Conference of the Parties to the UN Framework Convention on Climate Change comes days after the close of the Leaders Summit, which I reported on last week, and takes place against the backdrop of the United States’ withdrawal from the Paris Agreement and a general pullback of worldwide ambitions for decarbonization. It will be the first COP in years to take place without a significant American presence, although more than 100 U.S. officials — including the governor of Wisconsin and the mayor of Phoenix — are traveling to Brazil for the event. But the Trump administration opted against sending a high-level official delegation.

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Quino Raises $10 Million to Build Flow Batteries in India

The company is betting its unique vanadium-free electrolyte will make it cost-competitive with lithium-ion.

An Indian flag and a battery.
Heatmap Illustration/Getty Images

In a year marked by the rise and fall of battery companies in the U.S., one Bay Area startup thinks it can break through with a twist on a well-established technology: flow batteries. Unlike lithium-ion cells, flow batteries store liquid electrolytes in external tanks. While the system is bulkier and traditionally costlier than lithium-ion, it also offers significantly longer cycle life, the ability for long-duration energy storage, and a virtually impeccable safety profile.

Now this startup, Quino Energy, says it’s developed an electrolyte chemistry that will allow it to compete with lithium-ion on cost while retaining all the typical benefits of flow batteries. While flow batteries have already achieved relatively widespread adoption in the Chinese market, Quino is looking to India for its initial deployments. Today, the company announced that it’s raised $10 million from the Hyderabad-based sustainable energy company Atri Energy Transitions to demonstrate and scale its tech in the country.

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