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A little insulation goes a long way toward decarbonizing.
When you think about ways to decarbonize, your mind will likely go straight to shiny new machines — an electric vehicle, solar panels, or an induction stove, perhaps. But let’s not forget the low-tech, low-hanging fruit: your home itself.
Adding insulation, fixing any gaps, cracks or leaks where air can get out, and perhaps installing energy efficient windows and doors are the necessary first steps to decarbonizing at home — though you may also want to consider a light-colored “cool roof,” which reflects sunlight to keep the home comfortable, and electric panel and wiring upgrades to support broader electrification efforts.
Getting started on one or multiple of these retrofits can be daunting — there’s lingo to be learned, audits to be performed, and various incentives to navigate. Luckily, Heatmap is here to help.
Cora Wyent is the Director of Research at Rewiring America, where she conducts research and analysis on how to rapidly electrify the entire economy.
Joseph Lstiburek is the founding principal at the Building Science Corporation, a consulting firm focused on designing and constructing energy efficient, durable, and economic buildings.
Lucy de Barbaro is the founder and director of Energy Efficiency Empowerment, a Pittsburgh-based organization that seeks to transform the home renovation process and help low and middle-income homeowners make energy efficiency improvements.
Definitively, yes! When people hear the word “insulation” they often think of how it can protect them from the cold. And while it certainly does do that, insulation’s overall role is to slow the transfer of heat both out of your home when it’s chilly and into your home when it’s hot. That means you won’t need to use your air conditioning as much during those scorching summer days or your furnace as much when the temperatures drop.
Quite possibly! The most definitive way to know if your home could be improved by weatherization is by getting a home energy audit —- more on that below. While a specific level of insulation is required for all newly constructed homes, these codes and standards are updated frequently. So if you’re feeling uncomfortable in your living space, or if you think your heating and cooling bills are unusually high, it’s definitely worth seeing what an expert thinks. And if you’re interested in getting electric appliances like a heat pump or induction stove, some wiring upgrades will almost certainly be necessary.
Energy efficient appliances like electric heat pumps or induction stoves are fantastic ways to decarbonize your life, but serve a fundamentally different purpose than most of the upgrades that we’re going to talk about here. When you get better air sealing, insulation, windows, or doors, what you’re doing is essentially regulating the temperature of your home, making you less reliant on energy intensive heating and cooling systems. And while this can certainly lead to savings on your energy bill and a positive impact on the environment at large, these upgrades will also allow you to simply live more comfortably.
This is the starting point for making informed decisions about any energy efficiency upgrades that you’re considering. During a home energy audit, a certified auditor (sometimes also referred to as an energy assessor or rater or verifier) will inspect your home to identify both the highest-impact and most cost-effective upgrades you can make, including how much you stand to save on your energy bills by doing so.
Wyent told me checking with your local utility is a good place to start, as many offer low-cost audits. Even if your utility doesn’t do energy assessments, they may be able to point you in the direction of local auditors or state-level resources and directories. The Residential Energy Services Network also provides a directory of certified assessors searchable by location, as does the Department of Energy’s Energy Score program, though neither list is comprehensive.
Audits typically cost between $200 and $700 depending on your home’s location, size, and type, as well as the scope of the audit. Homeowners can claim 30% of the cost of their audit on their federal taxes, up to $150. To be eligible, make sure you find a certified home energy auditor. The DOE provides a list of recognized certification programs.
Important: Make sure the auditor performs both a blower door test and a thermographic inspection. These diagnostic tools are key to determining where air leakage and heat loss/gain is occurring.
Your energy audit isn’t the only thing eligible for a credit. The 25C Energy Efficient Home Improvement Credit allows homeowners to claim up to 30% of the cost of a variety of home upgrades, up to a combined total of $1,200 per year. This covers upgrading your insulation, windows, doors, skylights, electrical wiring, and/or electrical panel. Getting an energy audit is also included in this category.
While $1,200 is the max amount you can claim for all retrofits combined, certain renovations come with their own specific limitations. Let’s break it down:
State and local incentives:
Depending on where you live, there may be additional state and local incentives, and we suggest asking your contractor what you are eligible for. But since incentive programs change frequently, it’s a good idea to do your own research too. Get acquainted with Energy Star, a joint program run by the Environmental Protection Agency and the DOE which provides information on energy efficient products, practices, and standards. On Energy Star’s website, you can search by zip code for utility rebates that can help you save on insulation, windows, and electrical work.
“Starting by looking at your local utility programs can be a great resource too, because utilities offer rebates or incentives for weatherizing your home or installing a new roof,” said Wyent.
Everyone wants to minimize the number of times they break open or drill into their walls. To that end, it’s useful to plan out all the upgrades you might want to get done over the next five to 10 years to figure out where efficiency might fit in.
Some primary examples: Installing appliances like a heat pump, induction stove, or Level 2 EV charger (all of which you can read more about in our other guides) often require electrical upgrades. Even if you don’t plan to get any of these new appliances now, pre-wiring your home to prepare for their installation (with the exception of a heat pump — see our heat pump guide for more info on that) will save you money later on.
De Barbaro also notes that if you’re planning to repaint your walls anytime soon, this would also be a convenient time to add insulation, as that involves drilling holes which then need to be patched and repainted anyway. Likewise, if you were already planning to replace your home’s siding, this would be a natural time to insulate. Finally, if you’re planning to get a heat pump in the coming years, getting better insulation now will ensure this system is maximally effective.
Conversely, if you’re cash-strapped, spreading out electrical and weatherization upgrades over the course of a few years allows you to claim the full $1,200 tax credit every year. Whether those tax savings are enough to cover the added contractor time and clean-up costs, though, will depend on the particulars of your situation.
“Come in with a plan and talk to the contractor about everything that you want to do in the future, not just immediately,” said Wyent.
Unlike solar installers, which are often associated with large regional and national companies, the world of weatherization and electrical upgrades is often much more localized, meaning you’ll need to do a bit of legwork to verify that the contractors and installers you come across are reliable.
Wyent told me she typically starts by asking friends, family, and neighbors for references, as well as turning to Google and Yelp reviews. Depending on where you live and what type of work you want done, your local utility may also offer incentives for weatherization and electrification upgrades, and can possibly provide a list of prescreened contractors who are licensed and insured for this type of work.
These questions will help you vet contractors and gain a better understanding of their process regardless of the type of renovation you’re pursuing.
Common wisdom says you should always get three quotes. But that doesn’t mean you should automatically choose the cheapest option. Lstiburek says the old adage applies: “If it sounds too good to be true, it's probably too good to be true.” Be sure that your contractors and installers are properly licensed and insured and read the fine print of your contract. Beyond this, how to find qualified professionals and what to ask largely depends on the type of upgrade you are pursuing. So let’s break it down, starting with the biggest bang for your buck.
Air sealing and insulating your home is usually the number one way to increase its energy efficiency. Energy Star says nine out of 10 homes are underinsulated, and many also have significant air leaks. In general, homes lose more heating and cooling energy through walls and attics than through windows and doors, so air sealing and adding insulation in key areas should be your first priority.
“People don't realize how collectively, small holes everywhere add up. So on average here in Pennsylvania, typically those holes would add up to the surface of three sheets of paper, continuously open to the outdoors,” said de Barbaro.
Determining where air is escaping is the purpose of the blower door test and the thermographic inspection, so after your energy audit you should have a good idea of where to begin with these retrofits. This guide from the Department of Energy is a great resource on all the places in a home one might consider insulating.
Choosing an insulation type:
Every home is different, and the type of insulation you choose will depend on a number of factors including where you’re insulating, whether that area is finished or unfinished, what R-Value is right for your climate, and your budget. You can check out this comprehensive list of different insulation types to learn about their respective advantages and use cases. But when it comes to attic rafters and exterior walls, De Barbaro said that one option rises above the rest.
“The magic word here is dense-packed cellulose insulation!” De Barbaro told me.
This type of insulation (which falls under the “loose fill and blown-in” category) is made from recycled paper products, meaning it has very low embodied carbon emissions. It’s also cheap and effective. For exterior walls and attic rafters, be sure to avoid loose-fill cellulose, as that can settle and become less effective over time — although for attic floors, loose-fill works well. Both are installed by drilling holes into the wall or floor space and blowing the insulation in under pressure.
We recommend discussing all of these options with your contractor, but here are the other materials you’re most likely to come across:
In addition to asking friends, family, and your local utility for contractor recommendations, Energy Star specifically recommends these additional resources where you can find licensed and insured contractors for insulation work.
While air sealing and insulation should definitely be number one on your weatherization checklist, plenty of heat gets lost through windows, doors, and skylights, as well. Single pane glass is a particularly poor insulator, and while fewer houses these days have it, upgrading to double or triple pane windows or skylights can be a big energy saver. Likewise, steel or fiberglass doors are much better insulators than traditional wooden doors.
But be warned: These can be pricey upgrades. The cost of installing windows alone ranges from hundreds of dollars up to $1,500 per window, and many homes have ten or more. It’s unlikely you’ll fully recoup the outlay through your energy savings, so before going about these retrofits, be sure that you’ve taken care of the easy stuff first.
Once you’ve done your research, it’s time to schedule a consultation with an installer, who can help you refine your project needs, discuss design and installation options, and provide you with a quote.
“So if you pick a Marvin window, make sure that you have a Marvin certified installer in your location, installing the Marvin window according to the Marvin instructions.” said Lstiburek.
Insulating your attic floor or your roof rafters is the best way to ensure that your home is sealed off from the elements. But if you live in a hot climate and need a new roof anyway (most last 25 to 50 years), then you might consider getting a cool roof, which can be made from a variety of materials and installed on almost any slope. However, they won’t lead to energy efficiencies in all geographies, so be sure to do your research beforehand!
Last but certainly not least is a retrofit that’s a little different from the rest. Unlike getting insulation, new windows, or a new roof, upgrading your wiring or electric panel doesn’t lead to greater energy efficiency by regulating the temperature of your home. What it does instead is enable greater energy efficiency by making it possible to operate an increasing number of electrified appliances and devices in your house.
For example, getting an electric or induction stove or dryer, a standard heat pump, a heat pump water heater, or an electric vehicle charger will require that you add new electric circuits to support these devices. And as these new loads add up, you may need to install a larger electric panel to support it all.
After sourcing electrician recommendations from family and friends, a good place to turn is Rewiring America’s contractor directory network. (Rewiring America is also a sponsor of Decarbonize Your Life.)Networks in your area can then provide you with a list of qualified electricians.
“Most people are really only using somewhere around 40% of what their current panels space. So you can actually add a fair amount of new circuits to your existing panel and upgrade your wiring while not having to upgrade your panel at all,” Wyent said.
Once you have three quotes in hand, all that’s left to do is evaluate your options, choose a contractor or installer, and sign a contract. Cost will likely be a major factor in the decision, but you’ll also want to ensure that the cheapest quote doesn’t mean corners will be cut. Here’s what to look out for.
Pay close attention to warranties. This applies both to the warranty for the work being performed and to the warranties for the products themselves. If an installation job or a product is well priced but comes with a short warranty, this should give you pause.
Avoid “same day signing specials.” If you’re being rushed into signing a contract, this is also a bad sign. Be sure to read the fine print — most cost estimates should be good for a few weeks at minimum.
Get specific. Your quotes should specify the type of work being performed, the scope of the work, cost (broken down by materials, labor, permits, and other expenses), payment method, and a tentative timeline for completion. A quote is much less formal than a contract, so if some of this information isn’t provided up front, don’t hesitate to ask for clarification so that you can make apples-to-apples comparisons between different contractors.
When you get a contract in hand, double check that:
Then it’s time to sign, sit back, and enjoy the soothing sounds of hammering, drilling, insulation blowing, and wire tinkering, content in knowing that you’re decarbonizing your home down to its very bones!
Now that you’re living comfortably in a maximally energy efficient home, you’re probably wondering when you’ll start seeing all those incentives you researched pay off. First off, know that you must wait until all renovations are complete and paid for to claim your federal tax credit. That means that even if you purchased new windows this year, if you have them installed in 2025, you’ll file for a tax credit with your 2025 return. Here’s how to go about it.
For state and local incentives, check the website for your local utility as well your local and state government and energy office to see what documentation is required. When in doubt, keep all of your records and receipts!
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SpaceX has also now been dragged into the fight.
The value of Tesla shares went into freefall Thursday as its chief executive Elon Musk and traded insults with President Donald Trump. The war of tweets (and Truths) began with Musk’s criticism of the budget reconciliation bill passed by the House of Representatives and has escalated to Musk accusing Trump of being “in the Epstein files,” a reference to the well-connected financier Jeffrey Epstein, who died in federal detention in 2019 while awaiting trial on sex trafficking charges.
The conflict had been escalating steadily in the week since Musk formally departed the Trump administration with what was essentially a goodbye party in the Oval Office, during which Musk was given a “key” to the White House.
Musk has since criticized the reconciliation bill for not cutting spending enough, and for slashing credits for electric vehicles and renewable energy while not touching subsidies for oil and gas. “Keep the EV/solar incentive cuts in the bill, even though no oil & gas subsidies are touched (very unfair!!), but ditch the MOUNTAIN of DISGUSTING PORK in the bill,” Musk wrote on X Thursday afternoon. He later posted a poll asking “Is it time to create a new political party in America that actually represents the 80% in the middle?”
Tesla shares were down around 5% early in the day but recovered somewhat by noon, only to nosedive again when Trump criticized Musk during a media availability. The shares had fallen a total of 14% from the previous day’s close by the end of trading on Thursday, evaporating some $150 billion worth of Tesla’s market capitalization.
As Musk has criticized Trump’s bill, Trump and his allies have accused him of being sore over the removal of tax credits for the purchase of electric vehicles. On Tuesday, Speaker of the House Mike Johnson described Musk’s criticism of the bill as “very disappointing,” and said the electric vehicle policies were “very important to him.”
“I know that has an effect on his business, and I lament that,” Johnson said.
Trump echoed that criticism Thursday afternoon on Truth Social, writing, “Elon was ‘wearing thin,’ I asked him to leave, I took away his EV Mandate that forced everyone to buy Electric Cars that nobody else wanted (that he knew for months I was going to do!), and he just went CRAZY!” He added, “The easiest way to save money in our Budget, Billions and Billions of Dollars, is to terminate Elon’s Governmental Subsidies and Contracts. I was always surprised that Biden didn’t do it!”
“In light of the President’s statement about cancellation of my government contracts, @SpaceX will begin decommissioning its Dragon spacecraft immediately,” Musk replied, referring to the vehicles NASA uses to ferry personnel and supplies to and from the International Space Station.
“You can’t just divest from the eco-right after the election,” contends Johannes Ackva of Founder Pledge.
Johannes Ackva likes a contrarian bet. Back in 2020, when he launched the climate program at Founders Pledge, a nonprofit that connects entrepreneurs to philanthropic causes, he sought out “surgical interventions” to support technologies that didn’t already enjoy the widespread popularity of wind turbines and solar panels, such as advanced nuclear reactors and direct air carbon capture.
By late 2023, however, the Biden administration’s legislative sweep was directing billions to the very range of technologies Ackva previously saw as neglected. So he turned his attention to shoring up those political wins.
The modern climate movement came into its own demanding that the world stop shrinking from inconvenient truths. But as polls increasingly showed the 2024 election trending toward Republicans, Ackva saw few funders propping up advocates with any influence over the GOP. Founders Pledge pumped millions into Deploy/US, a climate group where former Republican Representative Carlos Curbelo of Florida served as the top adviser, which then distributed the money to upward of 30 right-leaning climate groups, including the American Conservation Coalition and the Evangelical Environmental Network.
The bipartisan gamble paid off. In April 2024, Founders Pledge received an anonymous $40 million donation to bolster its efforts. Now an anonymous donor has granted Founders Pledge’s climate fund another $50 million, Heatmap has learned.
Founders Pledge declined to say whether the money came from the same unnamed source or separate donors. But the influx of funding has “radically transformed our ability to make large grants,” Ackva told me, noting that the budget before 2024 came out to about $10 million per year.
“The word exponential is overused,” he said. “But that’s roughly the trajectory.”
Amid the so-called green freeze that followed the Trump administration’s rollback of climate funding, Founders Pledge has joined other climate philanthropies in stepping in to back projects that have lost money. When Breakthrough Energy shuttered its climate program in March, Founders Pledge gave $3.5 million to serve as the primary funding for the launch of the Innovation Initiative, started by former staff from the Bill Gates-backed nonprofit.
Ackva said his organization is looking to invest in climate efforts across the political spectrum. But Founders Pledge’s focus on right-of-center groups wasn’t an election-year gimmick.
“You can’t just divest from the eco-right after the election,” he said. “That’s not an authentic way to build a civil society ecosystem.”
As Republicans in Congress proceed with their gutting of green funding, including through Trump’s One Big, Beautiful Bill Act, Ackva said it’s too soon to say whether the political strategy is paying off.
“If you think of grantmaking as making bets, some bets exceed others sooner, but that doesn’t make them bad bets,” Ackva told me. “Ultimately, philanthropy cannot define how a given policy goes. You can adjust the probabilities, maybe level the bets. But obviously it’s larger forces at play that shape how the One Big, Beautiful Bill gets made.”
The Senate may save or even expand parts of the IRA that support baseload power, e.g. nuclear and geothermal. But regardless, Ackva said, climate advocates are making a mistake training their focus so intently on the fate of this one law.
“It’s kind of the only thing that’s being discussed,” he said.
Meanwhile the Infrastructure Investment and Jobs Act, better known as the Bipartisan Infrastructure Law, is set for reauthorization next fall. The Energy Act of 2020 is slated for renewal this year. And funding for the Department of Energy is up for debate as the White House now pushes to expand the Loan Programs Office’s lending authority for nuclear projects by $750 million.
“Those are things we would see as at least as important as the Inflation Reduction Act,” Ackva said.
Given those deadlines, Ackva said he expected other donors to press advocates for plans last year on how to sway Republicans toward more ambitious bills this Congress. But after former Vice President Kamala Harris took over the Democratic ticket last year, he said he’d heard from his grantees “that they were asked what they were going to do with a Harris trifecta.”
“Everyone was betting on Harris to win,” he said. “There’s a very strong ideological lean among climate funders to a degree that was frankly a little bit shocking.”
The partisan divide over climate wasn’t always so pronounced. In 2008, the Republican presidential nominee, John McCain, ran on a more ambitious decarbonization platform than what President Barack Obama proposed in the White House.
There are dueling — though not mutually exclusive — narratives about how the American climate movement over-indexed on one side of the political spectrum. Both stories start in 2010.
The version liberals and leftists will find familiar is one that blames fossil fuel megadonors such as Charles and David Koch for aggressively promoting climate denial among Republican lawmakers.
The version told by Ted Nordhaus, the founder of the Breakthrough Institute think tank where Ackva got his start years before joining Founders Pledge, starts with the failure of the Obama-era cap-and-trade bill to pass through Congress.
When the legislation “went up in flames in 2010,” Nordhaus told me, a bunch of environmental philanthropies hired Harvard professor Theda Skocpol to author a 145-page report on what triggered the blaze.
“The report concluded that the problem is we were too focused on the technocratic, inside-the-Beltway stuff,” Nordhaus summarized. “We needed to build political power so the next time there’s an opportunity to do big climate policy, we would have the political power to put a price on carbon.”
Out of that finding came what Nordhaus called the “two-pronged, boots-on-the-ground” era of the movement, which backed college campus campaigns to divest from fossil fuels and also efforts to prevent new fossil fuel infrastructure such as the Keystone XL pipeline.
Reasonable people could debate the fiduciary merits of scrapping investments in natural gas companies or the value of blocking oil infrastructure whose cancellation spurred more shipments of crude on rail lines that face higher risk of a spill or explosion than pipelines. But once supporting fossil fuel divestment or opposing pipelines became the key litmus tests activists used to determine if a Democrat running for office took climate change seriously, the issue became more ideological.
“That made it impossible for any Democrat to become a moderate on climate, and made it impossible for any Republican to be a moderate on climate,” Nordhaus said. “The Republican Party has its own craziness and radicalism, but a bunch of that is negative polarization.”
To fund an effective “climate right,” Nordhaus said, Founders Pledge should seek out groups that don’t explicitly focus on the climate or environment at all.
“I’d be looking at which groups are all-in on U.S. natural gas, which has been the biggest driver of decarbonization in the U.S. over the last 15 years; which groups are all in and really doing work on nuclear; and which groups are doing work on permitting reform,” Nordhaus said. “That’s how you’re going to make progress with Republicans.”
I asked Ackva where the line would be for funding an eco right. Would Founders Pledge back groups that — like some green-leaning elements of Italian Prime Minister Giorgia Meloni’s party or allies of France’s Marine Le Pen — support draconian restrictions on immigration in the name of reducing national emissions from the increased population?
“That would not be appropriate,” Ackva told me. “When we say we’re funding the eco right, like when we’re funding groups on the left or in the center, the things they are proposing don’t need to be exactly the things we will be prioritizing, but they need to be plausible, high-impact solutions.”
To Emmet Penney, a senior fellow focused on energy at the right-leaning Foundation for American Innovation, it’s an obvious play. The green left that has long dominated climate policy debates “is premised on aggressive permitting and environmental law that makes it impossible to actually build anything useful toward addressing the things they’re most afraid of.”
“It’s become clear to anyone who wants to build anything that what the environmental left has to offer simply doesn't work,” he told me. “Naturally, more centrist organizations who might not even otherwise be slated as right-wing now look that way and are becoming increasingly attractive to people who are interested in building.”
On Senate committees, a public lands selloff, and energy investment
Current conditions: Southern New England will experience its hottest day of the year so far today, with temperatures around 90 degrees Fahrenheit • Record levels of Sargassum seaweed are overwhelming Caribbean resorts • Saharan dust has spread across most of Florida and will continue over the coastal Southeast through this weekend.
1. The Senate’s first pass at IRA repeal cuts huge climate programs ...
On Wednesday evening, Republicans on the Senate’s Environment and Public Works Committee released their section of President Trump’s “One Big, Beautiful” budget reconciliation bill. “At least so far, it’s hardly deviating from the stark cuts to the Inflation Reduction Act that have already passed the House,” my colleague Emily Pontecorvo wrote in her analysis of the contents — although there is one Environmental Protection Agency grant program, for reducing pollution at ports, that had been targeted in by the House bill and is absent from the Environment and Public Works Committee’s text. As in the House bill, the latest text eliminates the $27 billion Greenhouse Gas Reduction Fund, which the Trump administration has sought to kill with accusations of fraud, though it has yet to produce any evidence of impropriety.
Elsewhere in the Senate, however, some Republicans appear more friendly toward preserving at least some IRA tax credits. “I would be in the camp that doesn’t think we need [to do] a full repeal and instead can live with a circumscribed, narrower version of the existing IRA credits,” Senator Todd Young of Indiana, a member of the Finance Committee, said, as reported by Axios. Senator John Curtis of Utah published an op-ed in Deseret News on Wednesday in which he argued that “the right policy solution must navigate tax credits and regulatory reform in what I believe is central to America’s economic future, the planet and our national security: energy.”
2. … and a public lands sell-off is back on the table
Senate Republicans are reviving a plan to sell off public lands to fund President Trump’s tax cuts after their colleagues in the House thwarted a similar proposal, Senator Mike Lee of Utah told reporters on Wednesday. According to the senator, a new version of the plan will be included in the Committee on Energy and Natural Resources’s pass at the bill, which will likely be made public on Monday, Bloomberg reports.
Representative Ryan Zinke of Montana helped lead the charge to kill the earlier version of the proposal in the House, although Lee added that his version would exempt Montana. Still — as I’ve reported — the plan would jeopardize as much as 500,000 acres of public land across Utah and Nevada alone. “These are the places people recreate with their families, they are places to hunt and fish, and they are held in trust for the American people to enjoy for generations to come,” Travis Hammill, the D.C. director for the Southern Utah Wilderness Alliance, said in a statement.
3. 2025 will be a banner year for energy investment, despite economic turbulence: IEA
Despite tariffs, trade wars, and economic uncertainty, the International Energy Agency anticipates a record $3.3 trillion investment in global energy in 2025, per a new report released Thursday. That represents a 2% rise from 2024. “The fast-evolving economic and trade picture means that some investors are adopting a wait-and-see approach to new energy project approvals, but in most areas we have yet to see significant implications for existing projects,” IEA Executive Director Fatih Birol said in a statement about the findings.
Around $2.2 trillion of the total global investment is “going collectively to renewables, nuclear, grids, storage, low-emissions fuels, efficiency, and electrification, twice as much as the $1.1 trillion going to oil, natural gas, and coal,” the report says. Solar specifically is booming, with a forecast of $450 billion in investment by 2025. The overall picture represents an enormous reversal from a decade ago, when fossil fuel investments were 30% higher than electricity generation, grids, and storage. That said, the research also found that investment in grids — at around $400 billion per year — is “failing to keep pace with spending on generation and electrification,” mainly because of “lengthy permitting procedures and tight supply chains for transformers and cables.” Read the full report here.
4. UK solar is having a record year due to unusually sunny spring
Carbon BriefSolar farms in the United Kingdom generated more electricity than ever before in the first five months of the year, according to a newly released accounting by Carbon Brief. The surge in solar energy was 42% higher than over the same period last year, growing from 5.4 terawatt-hours of electricity generated to a record 7.6 terawatt-hours. Carbon Brief credited the record output to the nation’s sunniest spring on record, although the publication notes it was also “aided by rising capacity, which reached 20.2GW in 2024, up by 2.3GW from 17.9GW a year earlier.” You can read the full report here.
5. ‘Atmospheric thirst’ is making droughts more severe: study
While extreme heat almost always has a climate change signal, the same cannot be said for droughts, which have different causes and feedback mechanisms that researchers are still working to understand. A new study published Wednesday in Nature has found that atmospheric evaporative demand — that is, the complex process of water evaporation into the atmosphere, also called “atmospheric thirst” — has increased drought severity by an average of 40%. Over the five years from 2018 to 2022, areas in drought have expanded 74% on average compared to the 1981 to 2017 period, with atmospheric evaporative demand “contributing to 58% of this increase,” the report further found. “We were very much shocked when we saw the results,” Solomon Gebrechorkos, a hydroclimatologist at the University of Oxford and lead author of the study, told The New York Times.
“A large majority of new residential houses and buildings in Germany feature a heat pump as their main heating system,” according to government numbers reported by Clean Energy Wire. “The climate-friendly heating technology was installed in more than two-thirds (69.4%) of the 76,100 homes finished in 2024, a 5% increase compared to 2023.”