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An energy-efficient home needs energy-efficient lightbulbs and air conditioners and refrigerators and other gadgets to fill it up. But it all starts with the structure itself. That’s why we recommend you take a good, hard look at your walls, ceiling, floors, windows, doors, roof, and electrical wiring as a first step towards decarbonizing your home life. (Embarking on a renovation? Heatmap has a guide for that.)
When you add air sealing and insulation, get energy efficient windows, or a cool roof that reflects heat back into the environment, you’re either preventing heat from entering or escaping. This stabilizes your indoor air temperature, thereby reducing your heating and cooling loads, which account for 55% of a household’s total energy use, on average. Making these improvements is not only good for the environment, it’s also a boon to your quality of life. Plus, it allows you to get the most bang out of one of Heatmap’s other favorite decarbonization upgrades: replacing your furnace with an electric heat pump, which operates most efficiently in a well-insulated home.
And lest we forget the electrification upgrades, they’re certainly a different beast than the aforementioned ways to seal up your house. But adding new electrical circuits is a prerequisite to installing energy-efficient appliances such as electric stoves, dryers, heat pumps, heat pump water heaters, or EV chargers. And depending how much space is on your electric panel, you might need to upgrade that too.
None of the investments mentioned here (often referred to as weatherization upgrades) will directly decarbonize your space. Insulating your attic won’t free you from fossil fuels, and installing new wiring doesn’t actually electrify anything in and of itself, although they will lower your energy-related emissions. But what these renovations do do is prime you to consume less energy at home just keeping yourself comfortable.
“The weather that you can expect to see where you live is changing over time and changing in a pretty unpredictable manner,” Michael Gartman, a manager at RMI on their carbon-free buildings team, told me. “The benefit of weatherization, unlike some of the other decarbonization measures that you might be thinking about, is it really just shelters you from whatever that change means over time.”
None of this sounds very thrilling, I know. These types of upgrades certainly won’t lead to the same oohs and ahhs that you’d get for buying a shiny new electric vehicle or induction stove. “You often can't see weatherization after it's been completed, and even if you can, I don't think many people are going to be taking guests into their basement and pointing at their floor joists and saying, look at all that insulation,” Gartman told me.
Probably not, but once folks spend some time inside your house, the benefits will become apparent in cooler summer days and cozier winter nights — and lower energy bills. “Even if it’s not sexy, that's something that you're going to feel every year that you're in your home,” Gartman said.
These upgrades that you’re considering — and the attendant reductions in energy use — will have impacts that ripple out beyond your home’s walls and onto the grid at large. After all, residential energy consumption makes up 21% of total energy use in the U.S., and 15% of total emissions.
“Weatherization can reduce peak demand on the grid, which reduces the likelihood of the grid going down in the coldest winter nights or hottest summer days,” Gartman told me. This makes the grid greener, too, as utilities often meet demand spikes by calling on fossil fuel sources such as gas plants, which can ramp up and down quickly. A smoother demand curve can thereby increase the share of renewables in the mix. And in the case that the grid does fail and the power goes out, a fully weatherized home is a safer home, protecting you and your family from the elements for as long as possible.
Depending on what weatherization measures you go with, as well as your specific circumstances, your savings could eventually surpass your upfront costs. The upgrade that’s most likely to pay for itself is air sealing and insulation, which can lead to energy bills that are 10% to 20% smaller, leading to net savings in just a few years. The Green Building Alliance says cool roofs — which are not suited to every environment — can also pay for themselves in as little as six years. And while complete window replacements are a particularly pricey upgrade, if you opt for storm windows that are installed on top of an existing window, you could see payback as soon as three years time post-installation.
No matter what you choose to do, the absolute best time to do it is when prices are low — and when it comes to energy efficiency upgrades, the discounts have arrived. “A lot of energy performance improvements to houses right now are on sale, and they're going to be on sale until the end of the decade,” Eric Werling, former national director of the Department of Energy’s Zero Energy Ready Homes program, told me. He’s referencing the $1,200 federal tax credit for weatherization, which is available now, and the home efficiency and electrification rebates that will be rolling out this year and next.
But even with this years-long sale, we know that the upfront costs can be tough to shoulder. So don’t feel pressure to drop thousands in the name of decarbonization right now. If you stay in your spot long enough, you’ll eventually need to undertake at least a few home improvement projects. “Anytime anybody does a renovation project or fixes a problem in the house,” Werling told me, “I implore them to think about, is there an opportunity for me to make improvements to the house that will pay for themselves in utility cost savings, but also improve the health and safety and comfort of the house that we live in?”
You’ll find the answer is often yes, and we encourage you to let your friends, family, and neighbors know about it. Because while we trust that you, as a reader, care deeply about the climate, you don’t actually need to give a hoot to benefit from energy efficiency upgrades. As Werling put it, “It's just not about energy, and it's just not about the climate. It's about your home.”
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The U.S. central bank left its interest rate target unchanged for the fifth time in a row.
Interest rate relief isn’t coming anytime soon for renewables. As widely expected, the Federal Reserve chose to keep rates unchanged on Wednesday, despite intense pressure from President Trump and two Republican Fed governors to lower rates.
The Fed maintained the benchmark short term rate at a range of 4.25% to 4.5%. During the press conference that followed the rate announcement, Fed Chair Jerome Powell gave no indication that the board will lower rates at the Fed’s next meeting in September, either. That’s contrary to Trump’s claims to reporters after the meeting. “We have made no decisions about September,” Powell said. “We don’t do that in advance. We’ll be taking that information into consideration and all the other information we get as we make our decision.”
High interest rates are particularly detrimental to renewable energy projects, as my colleague Matthew Zeitlin has noted many times over. The long-term benefit of renewables, of course, is that the wind and the sun are free (and effectively inexhaustible) fuel sources. The short-term tradeoff, however, is that renewables are capital-intensive, requiring high upfront costs to get up and running. The highest proportion of the lifetime cost of a renewable energy generator, such as a wind turbine or a solar farm, is in building it. Elevated interest rates make it that much more difficult to lure investors and borrow the significant capital necessary to build out renewable infrastructure.
“The lack of interest rate relief means that construction loans, which are floating-rate loans tied to market conditions, will command higher interest rates and raise the total project costs for energy developers,” Advait Arun, senior associate of energy finance at the Center for Public Enterprise and a Heatmap contributor, told me over email. “Developers rushing to build solar and wind energy between now and next summer to take advantage of tax credits will have to pay out these higher interest costs as they build.”
Though the Fed’s decision was unsurprising, the circumstances surrounding Wednesday’s meeting were out of the ordinary. For the first time since 1993, multiple Fed governors cast no votes on a rate decision. Christopher Waller and Michelle Bowman, both Republicans appointed by Trump, have voiced their preference for the Fed to lower rates by a quarter of a percentage point.
Additionally, Trump himself has been vocal about his views on chopping interest rates,— even going so far as to publicly threaten to fire Powell and appoint himself as head of the central bank, though he is legally unable to make good on his promise. Trump also recently criticized the Fed’s $2.5 billion building renovation project, singling out Powell for cost overruns. At the press conference on Wednesday, Powell emphasized the importance of the Fed’s independence from outside influence. “If you were not to have that, there’d be a great temptation of course to use interest rates to affect elections, for example,” he said.
While it may appease Trump, cutting interest rates won’t hold back the major energy price shocks that are very likely on their way. “Cutting rates sooner rather than later might make it easier for market actors to weather the coming shocks, but — crucially — they will not address the fiscal policy issues that created the shocks,” Arun noted. “However helpful rate cuts might be, they are not a solution to tariffs, tax credit uncertainty, and, soon, sharp spikes in electricity prices.”
The end of consumer electric vehicle tax credits isn’t great, but clawing back federal funding has been even worse.
Trump’s One Big Beautiful Bill took a huge bite out of the climate economy. One segment that emerged largely unscathed, however, is advanced climate tech. Companies working on nuclear, geothermal, battery storage, biofuels, and carbon capture may be shaken by the volatile business environment and a tad worried about provisions such as foreign entities of concern rules that could make their supply chains more complicated. But as of now, they can pretty much proceed with business as usual.
There is one big exception to that, however: The growing ecosystem of electric vehicle charging startups. Not only did OBBBA take a hammer to consumer EV tax credits, Trump also paused funding for key federal charging initiatives on his first day in office. While the startups I talked to were notably blasé about the former situation, executives are seriously worried about how attempts to clawback funding for charging infrastructure will impact the industry as a whole.
The outlook isn’t entirely bleak. Highway fast charging — generally the domain of larger companies such as Tesla, Electrify America, and ChargePoint — has actually seen solid growth so far this year despite the obstacles. But figuring out how to make charging work in urban centers and outlying communities has been a hot market for venture-backed companies over the past few years. And now some of them are facing a moment of reckoning.
“Cities are still pushing forward, but I would say there is a capital-C caution that’s being applied,” Tiya Gordon, founder of the curbside EV charging company It’s Electric, told me. “I think they feel that they need to get it right, and this is true for us as well as a startup. There’s not a margin for error in this environment.”
It’s Electric’s core innovation is siphoning off spare electrical capacity from buildings in cities to run its curbside Level 2, a.k.a. non-fast-charging EV charging network, negating the need for what can be a lengthy and complex grid interconnection process. The company then shares a portion of its revenue with the building owners who agree to the arrangement.
Just days before Trump took office, the startup was awarded $2.2 million from the Department of Transportation’s Charging and Fueling Infrastructure program to deploy curbside charging in Washington, D.C., legally obligated money that the new administration is now trying to rescind. That award remains in legal limbo. “We are proceeding as if we can’t count on that,” Gordon told me. “It’s sand through your fingers in an hourglass.”
That funding came on top of the company’s numerous awards from the Joint Office of Energy and Transportation, an interagency collaboration between the Department of Energy and the Department of Transportation created under the Bipartisan Infrastructure Law. Now the Joint Office has been effectively dismantled as former employees took deferred resignations and Trump has tried to revoke the funding awarded to It’s Electric and other startups.
All of this represents a significant financial setback for It’s Electric, as Gordon told me nondilutive funding — largely from federal and state grants — represents nearly half of the company’s total capital raised to date.
Gordon is hoping states will step into the breach, as climate leaders such as California and New York have thus far stood by their EV expansion plans. But Gordon has already noticed cities employing more diligence than ever when it comes to selecting partners. “They’re really going deep, they’re really taking time, they’re not rushing into any awards. So time is a big factor that represents caution,” she told me. And when it comes to the amount of chargers that cities seem to be looking to build, “the numbers are a little bit more modest.”
She mainly credits this pullback to the whiplash that Trump’s attempt to rescind funding for EV charging has caused. Compared to that, whatever deceleration the end of EV tax credits will cause in consumer uptake is a secondary concern.
“Honestly, that doesn’t really impact us at all,” Jeffrey Prosserman, CEO at Voltpost told me of the tax credits. His company retrofits lampposts in cities and suburbs, turning them into Level 2 EV charging platforms. “At the end of the day, EV adoption will either increase X or Y percent in a given year, but it’s going to continue to increase year over year. We’re past the tipping point, going from early adopters into the mainstream,” he told me.
EV prices are still falling, large businesses still want to electrify their fleets, and self-driving cars — which are far better suited to electric drivetrains — are still getting people excited, all of which should continue to fuel demand for a charging buildout. So while Prosserman acknowledged that nixing the consumer tax credits could “slow adoption by a couple percentage points,” he’s optimistic that the next political cycle will see a resurgence in support.
Like Gordon, however, he is quite concerned about the holdup in funding for both the Charging and Fueling Infrastructure program, or CFI, and its sister initiative, the National Electric Vehicle Infrastructure program, or NEVI. “It creates challenges for the EV charging companies like Voltpost, but it really fundamentally creates challenges for the cities and the general public who expected to have access to charging through these programs,” he told me. “That’s not to say that there isn’t a path forward. It’s just that the path that effectively the entire sector was operating on for the last few years has been reconfigured.”
NEVI is a $5 billion program that aims to build out a national charging network along highways, while CFI allocates $2.5 billion to deploy charging infrastructure in cities, towns, and hard-to-reach areas. Both were stood up in 2021 by the Bipartisan Infrastructure Law.
Politicians, industry analysts, and transportation officials alike have heavily critiqued these programs over the years for appearing to lack urgency, as building a network from scratch has proven to be an enormously complex and cumbersome undertaking. The former executive director of the joint office, Gabe Klein, said at a conference last year that the NEVI program wouldn’t really hit its stride until sometime between 2026 and 2028. Then Trump entered the White House and paused funding for both initiatives, creating a major roadblock for “the entire U.S. EV sector,” Prosserman told me.
Much like It’s Electric, Voltpost started the year by winning CFI funding to deploy its chargers in Washington, D.C,. and also secured a number of awards through the Joint Office of Energy and Transportation. With all of that money now tied up in lawsuits challenging Trump’s attempts to freeze the programs, Voltpost’s plans for growth have slowed. “We’re taking a more conservative approach for this year,” Prosserman told me, saying that while the company will eventually seek to raise a Series A it’s “not actively raising that Series A right now, given the macro situation.”
Prosserman said he’s been disappointed to see the general pullback in climate tech venture funding in the first half of 2025. “You have a group of investors who frankly said they are mission aligned, but are now taking a pause, not a stop, given the macroeconomic conditions, and having to wait until the dust settles to see how to reconfigure their portfolios,” Prosserman said. For now, he told me that Voltpost is leaning into its private-sector partnerships such as those with AT&T and Zipcar.
Not all charging companies have experienced this whiplash of funding awards and rescissions, though. SparkCharge, which makes portable, battery-powered fast chargers for commercial fleets and businesses, hasn’t received any NEVI or CFI grant money. The startup primarily serves customers by dispatching off-grid chargers on-demand or setting up stand-alone deployments, which are not core focus areas of either program.
The startup’s Chief Financial Officer David Piperno told me he’s glad that SparkCharge hasn’t relied on such capital, as it’s managed to “become a profitable enterprise with zero incentives, no state funding, no government funding.” That, he said, has allowed the company “to take a different approach to EV charging and be more innovative and have a variable pay-as-you-go model.” So far that seems to be working out pretty well, as it announced $30.5 million in new funding in May through a combination of equity financing and a venture loan.
Reaching former President Joe Biden’s goal of installing 500,000 publicly accessible EV chargers by 2030 still might be a longshot, though, especially as long as the Trump administration continues to target all things EV-related. And yet, charging executives remain relatively upbeat about the sector’s long-term fortunes.
“If you drive one of these vehicles, compared to what you had before, it’s just a superior car, right?” Piperno said, arguing that should continue to power steady consumer growth, even if it doesn’t happen as quickly as experts once predicted. While growth in EV sales increased by 40% in 2023, that slowed to just about 10% last year, as concerns over the availability of charging infrastructure, price, and range persist. “I think everyone thought that [the EV adoption] curve was going to be a lot faster. But I think that’s really normalized over the past few years already, and we don’t, quite frankly, see it normalizing much more than it has.”
At least now, executives told me, there’s more certainty regarding the policy landscape than at the beginning of the year. That holds especially true for startups that are willing and able to operate under the assumption that they might never see much of their recently awarded federal funding — at least anytime soon.
“The expression was, wait and see, wait and see, wait and see,” Gordon told me of Trump’s first months in office and the uncertainty around EV incentives and funding programs. “And now we waited and we saw, and it’s gone. And so we mourn and we move on, right?”
On NRC drama, Big Tech’s thirst, and Uplight’s for-sale sign
Current conditions: From Japan to California, the Pacific is preparing for tsunamis after one of the strongest earthquakes ever recorded struck the eastern coast of Russia • The Deep South is bracing for stifling temperatures • Hurricane Iona, the first named storm of the 2025 hurricane season in the Central Pacific, has reached Category 3 strength as it passes south of Hawaii.
It’s official: The Trump administration is going after the endangerment finding. The 2009 decision that greenhouse gases pose a danger to human life established the federal government’s legal right to rein in planet-heating emissions under the Clean Air Act and is the bedrock to virtually all national climate regulation. A rule proposed by the Environmental Protection Agency on Tuesday would scrap the finding and wipe out existing greenhouse gas rules on automobiles and heavy trucks. Also on Tuesday, the Department of Energy issued a report that “concludes that CO2-induced warming appears to be less damaging economically than commonly believed, and that aggressive mitigation strategies may be misdirected.”
The outcome of the rollback in the near term is likely years of lawsuits. As Harvard Law School’s Jody Freeman told Heatmap’s Emily Pontecorvo: “It doesn’t take effect for 30 days after it’s final. But yes, at that point, they get sued. These rules go to the D.C. Circuit Court of Appeals because that’s what the Clean Air Act says, and usually it would take about a year or so for a D.C. Circuit decision to happen. So now you’re in 2027. You can see the timeline on this stretching out.” In followup remarks by email, Freeman said: “From a legal perspective, the most aggressive argument they’re making is that they CANNOT regulate GHG emissions at all. If the Supreme Court agrees with that, a future administration can’t fix this. The backup arguments are more subtle and say, we have DISCRETION to use a different method to calculate a contribution toward endangerment, and we can consider many things other than science when making the endangerment finding. If the courts buy these arguments, a future administration could reverse course and rebuild.”
Since President Donald Trump first appointed Annie Caputo to the Nuclear Regulatory Commission in 2017, the Republican has made a name for herself as an industry-friendly champion of faster deployments of new reactors. Reappointed by former President Joe Biden in 2022, her term stretches through 2026. But on Tuesday, Caputo resigned, as I reported yesterday as a midday scoop in my Substack newsletter, Field Notes. The official reason she gave in the email she sent NRC staff is that the time had come to “more fully focus on my family.” But Caputo’s exit comes amid major political upheaval at what was once an oasis of bipartisan consensus.
In May, Trump proposed overhauling the way the NRC has long assessed the health risk from radiation as part of his four executive orders on nuclear power. Last month, in a move that critics decried as an illegal stretch of the White House’s authority over an independent agency, Trump fired Christopher Hanson, the Democratic commissioner who previously held the chair position. Earlier this month, E&E News reported that the Department of Government Efficiency representative detailed to the NRC had told the commission the White House expected it to “rubber stamp” new reactor designs that already gained approval from the departments of Defense or Energy. Emmet Penney at the conservative think tank FAI told me that if Caputo’s departure signals “radical changes” in the future, then the Trump administration’s efforts could backfire and lead to an “own-goal for energy dominance.”
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At least 34 factories or mineral refineries totaling more than $30 billion in investment have been paused, delayed, or canceled since Trump took office. That’s according to a new report from researchers at Wellesley College. “When you look at the projects that are slowing down, it’s all up and down the supply chain,” Jay Turner, an environmental studies professor who leads the database, told Heatmap’s Robinson Meyer.
A chart from the study.The Big Green Machine
The picture isn’t entirely bleak for EVs, at least not yet. Another 68 projects have advanced in the past six months, representing $24 billion in investment and more than 33,000 jobs.
Earlier this year, the lobby group Data Center Coalition and Facebook-owner Meta each asked the Trump administration to loosen permitting for data centers under the Clean Water Act. In an executive order unveiled last week, Wired reports that Trump responded by proposing a set of specific recommendations that mirror what the industry requested.
If implemented, the effects would vary by project, environmental lawyers told Wired. But the move comes amid increased scrutiny of data centers’ thirst for water. Earlier this month, The New York Times reported that a town’s wells ran dry after Meta broke ground on a new data center in Georgia.
In 2023, the startup Uplight tightened its grip on the distributed energy resource management market by acquiring the AI software company AutoGrid from Schneider Electric. Now Uplight is looking to sell itself. The company is pitching itself as “an AI-enhanced, full-stack platform built for the grid’s new demand,” according to a scoop yesterday from Latitude Media’s Maeve Allsup. With electricity demand surging and the aging grid heaving under pressure from extreme weather, technology to harness the solar panels, batteries, and other energy resources traditional utility infrastructure struggles to tap into is becoming crucial to avoiding blackouts.
Beyond Meat is finally getting beyond meat. The company plans to shed the flesh reference in its name this week as it launches its new Beyond Ground product that promises more protein than ground beef. “With this launch,” Fast Company’s Clint Rainey reported, “Beyond Meat is becoming merely Beyond and turning its focus away from only mimicking animal proteins to letting plant-based proteins speak for themselves. The radical move is cultural, agricultural, and financial.”