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Recommendations from our homes to yours.

As a renter in a walkable city, I can’t get heat pumps or solar panels and don’t need an EV. The main thing I try to do is buy used. There’s so many vintage, consignment, and thrift stores, online used clothing and furniture marketplaces, and even name-brand businesses that recycle old styles and models that you can find basically anything you want. Yearning for a pair of Lululemon leggings or in need of a basic black J.Crew blazer? Check Poshmark or Depop, where someone is inevitably giving away theirs for a discount. Facebook Marketplace is a goldmine for chairs, desks, lamps, toasters, fans, air conditioners, and so much more. If you’re in search of a couch or dresser that you need delivered, try AptDeco. Searching for used clothing and furniture takes time and effort, and can make me feel crazy. But fast fashion and furniture are a scourge of the Earth, and this is my best effort at resistance. — Emily
I’ve said it before, and I’ll say it again -- I fully endorse buying a used Chevy Bolt. With its estimated 259 miles of range and its zippy acceleration, there is no better bang for your buck if you’re considering an electric vehicle. Plus, you can score a federal (and sometimes state-level) rebate on the purchase if you meet certain income requirements. Factoring in incentives, it’s possible to nab one for about $12,000 in certain states. Sure, it’s not a head-turner, nor is it the fastest to charge, but you’d be hard pressed to find a better deal when buying an electric vehicle. — Mike
The internet overlords knew that I had been reporting on plastic waste and the myth of plastic recycling a few years back and bombarded me for months with perfectly targeted Instagram ads for Blueland. Eventually I caved and bought its reusable hand soap bottle and soap tablets (and eventually a number of other cleaning products, too). You can order new dissolvable tablets on a recurring or one-off basis, thereby avoiding buying and disposing of single-use plastic products every time you need more soap, detergent, or surface cleaner. Lest you need reminding, plastics are made from natural gas and crude oil, so even though you might not see emissions spewing out of your disposable dish soap bottle, know that there is indeed a better way. — Katie
We live in an older apartment that, unfortunately, does not have central air, and we haven’t yet sprung for a heat pump. Upon moving in last year, however, we replaced our old, drafty living room windows with double-pane windows, and the ancient window unit with a Midea U-shaped air conditioner. Our area is relatively dense and our apartment is across the street from a fire station, so in this case our pursuit of energy efficiency hasn't just improved our carbon footprint, but also our quality of life in terms of noise. — Matthew
I did my first Veganuary in 2021, while quarantining at my parents’ house (because there’s no time like a global pandemic to completely upheave your lifestyle). I’ve been a vegetarian for almost 20 years and have never eaten red meat, so I’d been pretty confident that going 31 days without using any animal products would be a piece of (plant-based) cake. Wrong. I was humbled by the challenge — and awakened to how much dairy and eggs I consume without even realizing it. Ever since then, I’ve been far more intentional about using ingredients like cheese and butter only when I really need them; my husband and I haven’t had cow milk in our fridge in years because we don’t mind the substitutes. That’s the thing about diet: While eating plant-rich meals is one of the highest-impact things an individual can do to reduce their emissions, it truly doesn’t have to be an all-or-nothing endeavor. Believe me, I still love cheese — but now I also know that vegan butter makes the best chocolate chip cookies. — Jeva
When my wife and I were in college, we became vegetarians together; we did it for reasons that involved animal welfare, personal health, and, somewhat embarrassingly, the fact that I got really into Daniel Quinn’s Ishmael. For the two of us, habit-shifting environmental concerns were not yet in the mix. Many years have since passed, and though we still don’t eat meat, those once-distant concerns have taken center stage, and on the rare occasion that we’re asked why we’re vegetarians, the state of the environment has become our first response. Though it now feels almost passive, avoiding meat remains one of the most significant ways that we — my wife and me, and also all of us — can reduce our emissions, and now that we’re parents, it feels like a valuable lesson that we’ve passed on to the next generation of lentil aficionados. — Jacob
When you use toilet paper from one of the big tissue brands, you are literally wiping your ass with a 100-year-old tree — so deeply is this seared into my brain that I could have sworn I’d read it word for word in the Natural Resources Defense Council’s inaugural “Issue With Tissue” report, but when I search the text, it’s nowhere to be found. In any case, the message stands: As recently as last year, all three of the major U.S. tissue manufacturers — Kimberly-Clark, Procter & Gamble, and Georgia-Pacific — still made their toilet tissue and paper towels exclusively from virgin forests, which is simply not something I can live with. In my house, we use Seventh Generation Extra Soft & Strong, made from 100% recycled paper pulp and treated with non-chlorine bleach. But things are beginning to change! The sixth edition report came out last week, showing that two out of the Big Three have improved their options and practices. — Jillian
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The spinoff of Lawrence Livermore National Lab has a new 10-point plan to get onto the grid by the 2030s.
One of fusion energy’s newest startups, Inertia Enterprises, is betting that the fastest route to commercial fusion runs through one of the field’s oldest ideas. The company, which raised a $450 million Series A earlier this year, plans to build a power plant based on the laser-driven fusion system pioneered at Lawrence Livermore National Laboratory’s — the only tech yet to have produced more energy from a fusion reaction than it took to initiate it. Now, Inertia has shared its commercialization roadmap exclusively with Heatmap, detailing the 10 near-term capabilities it must demonstrate before this landmark experiment can become a grid-scale power plant by the mid-2030s.
The roadmap offers a route from the national lab’s impressive but commercially impractical fusion demonstrations to an economical power plant capable of producing electricity for the grid. At its core are a set of milestones — mostly aimed at developing cheap, mass-manufacturable components — that Inertia says it must clear before those individual systems can be integrated into a working plant. This road is not necessarily linear, however, as various teams will likely be working on many of these goals simultaneously.
At least the physics of Inertia’s approach are already proven, the startup’s CEO Jeff Lawson told me, pointing to the fusion experiments at Lawrence Livermore’s National Ignition Facility as a proof-of-concept. The lab’s demonstration of net energy gain caps more than six decades and $30 billion (in 2026 dollars) of U.S. fusion research. The remaining challenges, he argued, are all engineering-related, requiring “elbow grease, hard work, and smart people” rather than breakthroughs in fusion science.
"It seems to us like a startup or a commercial company of any variety should be focused on commercializing a proven scientific result, as opposed to actually trying to demonstrate the basic science to begin with," Lawson told me. Basic science, he argues, is better left to national labs and universities, where researchers can pursue "unbounded problems" that don’t align with the expectations and timelines of venture-backed startups.
Indeed, no fusion startup has yet achieved scientific breakeven, the milestone Lawrence Livermore first hit in 2022, and has since repeated numerous times. But leading players such as Commonwealth Fusion Systems and Helion Energy maintain that it’s only a matter of time before they validate the physics behind their own reactor designs, which they claim will be highly cost-competitive.
Lawson, on the other hand, readily acknowledged that Lawrence Livermore’s tech is uneconomical in its current form. His bet is simply that the more predictable path to a commercial reactor is to drive down the cost of the lab’s validated fusion approach, known as inertial confinement. This system relies on high-powered lasers firing at a millimeter-scale pellet of fusion fuel, compressing it to extreme temperatures and pressures until the atoms fuse. Today, the National Ignition Facility makes each individual fusion target by hand, a workable solution given that it only uses about a dozen per year.
That production model, however, isn’t remotely plausible for a grid-scale power plant. Because each fusion reaction lasts just a fraction of a billionth of a second, a commercial facility must fire its lasers at a fresh target about 10 times per second to generate continuous electricity — requiring the production of hundreds of millions of targets each year.
Scaling production to roughly a million pellets per day and making them inexpensive enough for commercial operation without compromising the strength or precision required for fusion ignition is central to Inertia’s roadmap. That includes goals five, seven, eight and nine — industrializing the manufacturing of the carbon shells that hold the fusion fuel, making the thin films that hold those carbon shells both durable and cheap, scaling up and automating fusion target assembly, and speeding up how fast targets are filled with the requisite deuterium-tritium fuel.
The other central focus of the roadmap is the laser system, which will ultimately consist of 1,000 individual units operating in concert to compress and heat the fusion fuel. Key priorities include reducing the system’s cost (goal two), dramatically increasing its firing cadence (goal three), and bolstering its durability to withstand high-intensity operations (goal four). Goal six also complements these efforts, calling for the development of a control system capable of tracking moving fusion targets to precisely align each laser shot.
Goals one and 10 bookend the journey with some broader milestones. The first focuses on increasing the fusion target’s energy gain — the ratio of fusion energy produced to laser energy delivered — to more than 25 times ignition. Today, the National Ignition Facility’s best-performing laser shot has yielded a gain of just over four times what it took to start the reaction. Goal 10 then zooms out to the ultimate objective: integrating all these technologies into a commercially viable power plant that can deliver either electricity or industrial heat to end customers.
To reach that point, Inertia has embarked on an industrial engineering hiring spree, recruiting folks with experience taking complex hardware systems from prototype to mass production, “not unlike the processes that are used in the semiconductor or consumer electronics world,” Lawson explained. The company has been making progress on its component development goals since the beginning of the year, he told me, and expects to announce the successful demonstration of a few of these milestones in the coming months. Lawson ultimately expects Inertia to complete the core components of its laser and target manufacturing systems by the middle of next year.
The team will spend the next two to three years integrating these individual pieces into two fully operational subsystems, a prototype laser system and a target manufacturing line. Around 2030, the company will begin combining those subsystems into a first-of-a-kind fusion power plant, which will also serve as the proving ground for the target chamber, tritium fuel breeding system, and power conversion system that turns fusion heat into electricity. By the middle of the next decade, Inertia aims to be generating power from this first plant, setting the stage for the company to build and connect additional grid-scale commercial power plants.
There are plenty of engineering trade-offs that the company will have to solve for. Take the decision around how to size the target chamber, for example. “If you make it bigger, your walls have an easier time and survive longer, but it’s more expensive. If you make it smaller, your walls have a tougher time because they’re closer to all the heat and energy that the fusion reaction is creating, but now your power plant costs less to build.”
But to Lawson, this represents exactly the type of problem Inertia was built to solve: complex engineering issues that come to the fore once scientists have demonstrated the fundamental physics are sound. He thinks other fusion companies may someday reach this stage, as well — though he’s unwilling to hazard a guess on exactly what approach or startup is best positioned to do so.
“There have been generations of scientists who’ve made their predictions about fusion energy and gotten it wrong,” he told me. “I’m not going to pretend to be smarter than them. All I’m here to say is, just knowing that one did work, we can commercialize it.”