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  • 4 Startups Making Money While Helping Mitigate Climate Change

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    Four U.S. companies landed a spot on MIT Technology Review‘s annual list of Climate Tech Companies to Watch. Spanning industries from nuclear and geothermal power to battery recycling and gene editing, these businesses demonstrate resilience and potential to thrive in spite of—or in some cases because of—shifting political and economic forces in the U.S.

    These climate tech companies were selected based on a number of criteria including the likelihood that the technologies can mitigate climate change threats or reduce emissions, and whether they are likely to actually succeed as businesses, according to MIT Technology Review senior editor James Temple.

    This year’s list is also shorter than lists of past years and is much more “geographically diverse,” Temple noted, which reflects the challenges facing these technologies and businesses at large. Alongside U.S. companies, the list includes those from Canada, China, Germany, India, and Sweden.

    Here are the four homegrown climate tech companies featured on MIT’s list:

    Fervo Energy

    Fervo Energy is a Houston-based company applying oil and gas practices to make geothermal energy more cost effective and accessible. Whereas geothermal energy extraction is usually location-specific (think: Iceland), Fervo uses hydraulic fracturing and horizontal drilling to access the energy source almost anywhere. In June, Fervo landed $206 million, much of it from Bill Gates’s Breakthrough Energy Catalyst, to continue building out the world’s first enhanced geothermal power plant in Utah (and in September got a big shoutout in Gates’s famous blog). 

    When the Trump administration’s One Big Beautiful Bill Act passed into law in July, it curtailed or eliminated a number of tax incentives for various industries like solar, wind, and EVs. But key Biden-era tax incentives were largely preserved for geothermal and nuclear. Plus, U.S. energy secretary Chris Wright listed geothermal as a priority alongside advanced nuclear, hydropower, and fossil fuels when expanding on Trump’s early, energy-related executive orders

    That said, possible risks to the technology’s viability include lengthy permitting processes, and the seismic risks that fracking more broadly can pose, according to MIT.

    Kairos Power

    Alameda, California-based Kairos Power is developing advanced nuclear reactors that executives say can produce reliable and abundant nuclear power more safely and affordably than today’s fission reactors. Kairos’s reactor design uses a robust fuel form that can remain intact at high temperatures, as well as a molten fluoride salt as a coolant, rather than water. The company has backing from Google, with which it struck a deal that is poised to help develop its small modular reactor technology and inked a historic deal in August with a major U.S. utility. 

    Like Fervo, Kairos Power operates in an industry with which the Trump administration’s has taken a comparatively friendlier stance. Kairos aims to kick off commercial operations as soon as 2030, but risks remain. MIT Technology Review noted Kairos isn’t the first to experiment with molten salt reactors—other such projects have failed—plus Kairos’s unique fuel requires specialized uranium that previously was mostly sourced from Russia. 

    Pairwise

    Pairwise applies Crispr gene editing technology to crops. In partnership with biotech giants Bayer and Corteva, the Durham, North Carolina-based startup aims to produce crops that can withstand the increasingly hostile conditions of a planet with a changing climate, according to MIT.

    The company already introduced a less bitter mustard green, and now it is turning its focus toward sturdier corn, high-yield yams, and disease-resistant cacao trees with various partners including the Gates Foundation and global candy company Mars. Pairwise has not yet successfully introduced to market any of its climate optimized foods, and risks remain about how consumers might receive them, MIT noted.

    Redwood Materials

    Carson City, Nevada-based Redwood Materials has already made a name for itself as a U.S. leader in battery recycling. Now it’s moving into battery upcycling, turning end-of-life EV batteries into microgrids that experts believe could be crucial for shoring up the grid amid rising energy demand.

    As more consumers adopt electric vehicles, there’s increasing domestic and global demand for minerals like lithium and cobalt. Redwood says that recycling batteries reduces the need for mining and boosts the domestic supply chain, all while cutting carbon emissions by 70 percent compared with processing mined materials, MIT Technology Review reported. Plus, this new microgrid technology could help quickly meet power needs as data centers demand ever more energy. But as MIT points out, Redwood still has technical and scaling hurdles to clear for its microgrids, and the viability of the business could be threatened if consumer demand for EVs tumbles.

    Check out the full list of Climate Tech Companies to watch here.

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    Chloe Aiello

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  • Rodatherm Energy wants to make geothermal more efficient, but will it be cheaper? | TechCrunch

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    Rodatherm Energy, a new geothermal startup, emerged from stealth Monday with $38 million in funding and a plan to build a pilot plan in Utah. 

    The startup differentiates itself by plumbing its boreholes with a closed loop, likely made of steel, that’s filled with a refrigerant. That contrasts with other enhanced geothermal companies, which tend to use water to transport heat from deep within the Earth.

    The Series A round was led by Evok Innovations with participation from Active Impact Investments, Giga Investments, Grantham Foundation for the Protection of the Environment, MCJ, TDK Ventures, Tech Energy Ventures, and Toyota Ventures.

    Rodatherm faces stiff competition with an established field of players, including Fervo Energy, Sage Geosystems, XGS Energy, and Quaise.

    Fervo is considered the frontrunner in the space having raised nearly $1 billion. The company is on track to complete a 100-megawatt first phase of its Cape Station power plant next year with an additional 400 megawatts coming online in 2028. It also has a deal to supply Google with electricity for its data centers. XGS Energy also has a data center deal, one with Meta, to develop a 150-megawatt power plant in New Mexico to power the tech company’s data centers.

    Rodatherm says that its closed-loop, refrigerant-based approach is 50% more efficient than a typical water-based system. Air-source heat pumps, commonly called minisplits, use hydrocarbon-based refrigerants to shift heat between indoors and out.

    The startup’s patent on the technology says that the closed-loop design will eliminate the need for filters to screen grit and debris that open-loop systems might suck up as the water flowing through the ground breaks bits of rock loose. It also says that the closed loop system will minimize water use.

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    But Rodatherm’s approach will almost certainly come with increased drilling and installation costs relative to simpler systems. It’s possible that the added efficiency its refrigerant-based design could offset those costs, though that remains an open question until the company completes a well.

    The company plans to use the Series A funding to complete a small pilot 1.8-megawatt pilot plant in Utah by the end of 2026. Utah Associated Municipal Power Systems plans to buy electricity from the project.

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    Tim De Chant

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