Here’s how deep geothermal drilling might be clean energy’s future
Quaise Energy is on a mission to prove that deep geothermal drilling could provide more than enough clean energy to meet the world’s needs as we move away from fossil fuels. Matt Houde, cofounder at Quaise Energy, explained its potential at the TEDX Boston Planetary Stewardship Event last week.
The aim of the Boston event, which was timed to run at the same time as COP27 in Egypt, was to “spotlight actionable ideas for human activity to achieve a sustainable relationship with the planet’s natural systems,” according to TEDX Boston’s website.
Deep geothermal’s potential
Houde, a speaker at TEDX Boston, explained why deep geothermal has so much potential:
The total energy content of the heat stored underground exceeds our annual energy demand as a planet by a factor of a billion. So tapping into a fraction of that is more than enough to meet our energy needs for the foreseeable future.
But we can’t yet drill deep enough to unlock that energy. Houde continued:
If we can get to 10 miles down, we can start to find economic temperatures everywhere. And if we go even deeper, we can get to temperatures where water [pumped to the site] becomes supercritical, [a steam-like phase that will allow] a step change improvement in the power production per well and so cheapen the cost of energy.
The deepest hole that’s been drilled to date, the Kola borehole in Russia, is 7.6 miles deep. It took 20 years to complete because conventional equipment like mechanical drill bits break down at those depths.
“And the truth is, we’ll need hundreds if not thousands of Kola boreholes if we want to scale geothermal to the capacity that’s needed,” Houde said. He went on to assert that Quaise:
[I]s developing technology to blast rock with microwaves to potentially drill the deepest holes on Earth. And no, I’m not stealing a plot device from Star Trek. This technology is real and has been proven in [an MIT] lab.
Deep geothermal’s possibility
Houde explained the benefits of deep geothermal energy in general. These include being available 24/7, which “can help balance out the intermittent flows of wind and [solar].” Deep geothermal plants also won’t need much land. Houde illustrated this with an artist’s rendition of a future rig next to truck shipping containers (see main photo).
Houde also said that deep geothermal is “the perfect energy source to take advantage of the largest workforce in the world, the oil and gas industry.” That industry has “11 million jobs in the US alone, and a skill set that is exactly what’s needed for geothermal to rapidly scale.”
Drilling with microwaves
Quaise is working to replace conventional drill bits with millimeter wave energy – cousins to the conventional microwaves we heat up our leftovers with. Those millimeter waves literally melt then vaporize the rock to create ever-deeper holes.
Scientists developed the general technique at MIT over the last 15 years, and proved that millimeter waves could actually drill a hole in basalt. The gyrotron machine that produces the millimeter wave energy has been used for around 70 years in nuclear fusion research.
Quaise’s technique also uses conventional drilling technologies developed by the oil and gas industry. The company will use these to drill down through surface layers – what they were optimized for – to basement rock – which millimeter waves can easily power through.
Houde explained that millimeter waves “are ideal for the hard, hot, crystalline rock deep down that conventional drilling struggles with.” They’re not as efficient in the softer rock closer to the surface, but “those are the same formations that conventional drilling excels at.” That’s why Quaise applies a hybrid approach to the problem.
Challenges remain
There are still several challenges that Quaise has to tackle in order to scale its technology, including a better understanding of rock properties at great depths. Further, Houde said, “we need to advance the supply chain for gyrotrons” and the waveguides that carry their energy downhole. That equipment is currently optimized for specialized one-off projects in fusion research. For deep geothermal applications, they must be produced in quantity and be robust and reliable in a field environment.
There are also engineering challenges that must be addressed. Houde said:
Chief among them is, how do we ensure full removal of the ash [created by the process] and transport that ash up the borehole over long distances?
Progress so far
In the MIT lab, engineers drilled a hole in basalt with a 1:1 aspect ratio – 2 inches deep by 2 inches in diameter. Quaise built upon MIT’s results by scaling up the power density of the microwave beam and the depth of the hole by a factor of 10 to achieve a 10:1 aspect ratio. The company is now building the first field-deployable prototype millimeter-wave drilling rigs.
Houde said:
Our current plan is to drill the first holes in the field in the next few years. And while we continue to advance the technology to drill deeper, we will also explore our first commercial geothermal projects in shallower settings.
Image: Hector Vargas/Quaise Energy
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The US solar industry just delivered another huge quarter, installing 11.7 gigawatts (GW) of new capacity in Q3 2025. That makes it the third-largest quarter on record and pushes total solar additions this year past 30 GW – despite the Trump administration’s efforts to kneecap clean energy.
According to the new “US Solar Market Insight Q4 2025” report from Solar Energy Industries Association (SEIA) and Wood Mackenzie, 85% of all new power added to the grid during the first nine months of the Trump administration came from solar and storage. And here’s the twist: Most of that growth – 73% – happened in red states.
Eight of the top 10 states for new installations fall into that category, including Texas, Indiana, Florida, Arizona, Ohio, Utah, Kentucky, and Arkansas. Utah jumped into the top 10 this quarter thanks to two big utility-scale projects totaling more than 1 GW.
But the report also flags major uncertainty ahead. Federal actions, including a July memo from the Department of the Interior (DOI), have slowed or stalled the approvals pipeline for utility-scale solar and storage. Without clarity on permitting timelines, Wood Mackenzie’s long-term utility-scale forecast through 2030 remains basically unchanged from last quarter.
“This record-setting quarter for solar deployment shows that the market is continuing to turn to solar to meet rising demand,” said Abigail Ross Hopper, SEIA’s president and CEO. She added that strong growth in red states underscores how decisively the market is shifting toward clean energy. “But unless this administration reverses course, the future of clean, affordable, and reliable solar and storage will be frozen by uncertainty, and Americans will continue to see their energy bills go up.”
Two new solar module factories opened this year in Louisiana and South Carolina, adding a combined 4.7 GW of capacity. That brings the total new US module manufacturing capacity added in 2025 to 17.7 GW. With a new wafer facility coming online in Michigan in Q3, the US can now produce every major component of the solar module supply chain.
“We expect 250 GW of solar to be installed from 2025 to 2030,” said Michelle Davis, head of solar research at Wood Mackenzie and lead author of the report. “But the US solar industry has more potential. With rising power demand across the country, solar could do even more if current constraints were eased.”
SEIA also noted that, following an analysis of EIA data, it found that more than 73 GW of solar projects across the US are stuck in permitting limbo and at risk of politically motivated delays or cancellations.
Read more: EIA: Solar + storage soar as fossil fuels stall through September 2025
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The spiritual successor to the beloved Chevy Geo Tracker, production of the new-for-2026 electric Spark EUV has officially begun in Brazil with more than 200 miles of range.
That’s right, kids. To know the Chevy Tracker is to love the Chevy Tracker. The tiny, top-heavy Suzuki-based SUV combined bold colors, fun styling, (relatively) good fuel economy, and real off-road chops (especially in ZR2 trim) with an affordable price tag to make the Tracker an early favorite among the serious rock-crawling crowds.
Like, really
While it’s still too early to tell whether or not the all-new Chevy Spark EUV will come even close to that little proto-SUV, it seems we won’t have to wait much longer to find out – GM Authority reports that production of the 2026 Chevy Spark EUV has officially begun at Comexport’s Planta Automotiva do Ceará (PACE) plant, in the state of Ceará, Brazil.
GM Brazil invested the equivalent of $73 million to get the PACE factory ready to assemble GM’s modern, zero-emissions Chevy crossover for the South American and Middle Eastern markets – an investment big enough to earn a visit from Brazilian president Luiz Inácio Lula da Silva, who was on-hand for the December 3rd kickoff event.
“It’s not a car factory,” said Comexport Vice President and PACE shareholder, Rodrigo Teixeir. “(The) goal is to develop technology there, not simply assemble a vehicle.”
Production of the new Spark EUV began last week, with production of the equally new Chevy Captiva EV set to begin as early as Q1 of 2026.
2026 Chevy Spark EUV
The Made in Brazil Chevrolet Spark EUV is heavily based on the Chinese Baojun, and is powered by that vehicle’s single 75 kW (101 hp), 180 Nm (130 lb-ft) motor driving the front wheels. Power comes from the Baojun’s 42 kWh LFP battery that, with regenerative braking, is good for up to 360 km (220 miles) on the NEDC driving cycle.
Weirdly, the new Spark is also equipped with a 10.1″ infotainment screen and 8.8″ digital instrument cluster (above) that supports both Apple CarPlay and Android Auto standard – technology that GM claims lead to “unsafe” driver behaviors in North America.
Let us know what you think of the little electric SUV, and whether or not you think it would be a hit in the US (it would) in the comments.
SOURCE: GM Authority; images by GM, Harry Situations.
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