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We’re now a quarter of the way through the 21st century, and it’s indisputable that climate is one of the most important stories of our time. That’s our philosophy here at Heatmap, but just about everything around us illustrates it, too — from government policy and tech to movies and reality TV.
And of course — or maybe, especially — books.
It’s been about 17 years since the term “cli-fi” (or “climate fiction”) was first coined, and in the meantime, books that touch on climate themes in both fiction and nonfiction have taken off like the Keeling Curve. In 2025, we’ll be reading novels that imagine life in San Francisco after years of deluge and investigative reports into subjects such as how companies have gotten away with dumping forever chemicals into the environment for so long. There will be new natural histories to dive into — on the desert, forests, prairies, and even on the chemical compound CO2 — as well as new frames of thinking about climate change and how we approach its solutions.
Because so many 2025 books will touch on climate themes, I’ve set aside a section of honorable mentions at the end of this list that are also worth checking out. The division doesn’t indicate quality; I chose the primary 18 based on my subjective excitement and to showcase different genres, publishers, and authors. It might be in the appendix that you find a book on the topic you’re personally most excited about (Arctic exploration? Solar geoengineering? Florida-set family dramas?) for next year.
Finally, if you want to see all these books in one place or judge them by their (excellent) covers, you can browse our curated list on Bookshop here.
The U.S. government’s Fifth National Climate Assessment section on the Southwest reads like an apocalyptic horror story: “Heat-related mortality,” “increased wildfire risks,” and “longer and more severe droughts” all make it into the opening few paragraphs. The truth is that the hottest and driest region of the United States is home to 60 million people, many of whom will have to adapt to a more extreme future in the coming years. In New Mexico-born journalist Kyle Paoletta’s debut book, American Oasis, he traces the allure of places like Albuquerque, Phoenix, El Paso, and Las Vegas back to the Athapaskan migration from the sub-Arctic around 1100 BCE and through the heydays of Arizona Highways, a magazine from the 1950s, while also charting what lies ahead for those who are drawn to making the desert, however impossibly, their home. Preorder it here.
Speaking of the American desert, on the fiction side of things this winter comes Madeleine Watts’ latest novel, Elegy, Southwest. Watts made a name for herself as a writer of cli-fi after the release of her 2021 novel, The Inland Sea, set against the backdrop of Australia’s fires and floods, and she returns this year with a road trip novel that follows Eloise, a doctoral student studying the Colorado River and climate change. As part of her research, Eloise flies to Las Vegas for a road trip through the Southwest with her husband, Lewis, to whom the novel is addressed. Along the way, Eloise begins to believe she’s pregnant, while Lewis struggles with the fresh grief of losing his mother. As Watts told an interviewer of her process for The Inland Sea, “I wanted to write … about what it’s like to live in the experience of a changing climate that is not always a tangible part of your day-to-day but that’s already there – it’s in the air all around you.” Expect a similar treatment this go-round. Preorder it here.
Eric Puchner’s new novel, Dream State, is the story of two marriages set over 50 years. With the book opening in 2004, that naturally requires some speculation about the future — in this case, the future of “a rapidly warming Montana.” As The Indypendent writes in an early review, “The looming climate crisis — declining snowfall, depleted wildlife, raging seasonal wildfires, and abnormally warm temperatures — is writ large in the book, forming a blistering backdrop, highlighting newfound restrictions on what both residents and short-term visitors can now see and do in the area.” The novel has earned praise from Pulitzer Prize-winner Adam Johnson, who called it “a masterpiece,” as well as author Lynn Steger Strong, who has a climate book of her own on the list below. Preorder it here.
Four years ago, Argentinean author Agustina Bazterrica burst onto Americans’ radars with the English-language translation of her 2017 novel Tender Is the Flesh, a book that imagines a future in which animals have become toxic to humans, leading us to resort to industrialized cannibalism. (Critics have described it, vividly, as “splatterpunk.”) This year, Bazterrica turns her attention from factory farming to the climate catastrophe, telling the story of a member of a “Sacred Sisterhood” cloistered in a mysterious convent who is prompted to reflect on her life outside its walls when a new acolyte arrives. Don’t expect Bazterrica to soften her critiques of capitalism here, though it’s not all doom and gloom; early readers have said The Unworthy “ends on a light note of hope.” Preorder it here.
Charlotte McConaghy’s follow-up novel to her critically acclaimed 2020 debut, Migrations, is set on a fictional research island, Shearwater, located between Australia and Antarctica. Dominic Salt, the caretaker of the island’s seed vault, has called the refuge home for the past eight years — ever since fleeing Australia’s accelerating natural disasters, hoping to find a safer place to raise his three children. But with rising sea levels now threatening the island, Dominic and his family have just seven weeks left before they plan to move on. Just before their departure, Dominic’s oldest daughter discovers a woman who has shipwrecked on shore, and the tension — and mystery — starts to grow. Wild Dark Shore has earned a starred review from Kirkus, which calls it a “terrific thriller.” Preorder it here.
Climatologist, World Weather Attribution co-founder, and 2024 Trailblazing Women in Climate laureate Friederike Otto does not mince words about who is most impacted by extreme weather — and who needs to be involved in the solutions. “If we leave the issue of climate change to white men, it’ll continue to be treated as a physical problem with technological solutions,” she has said, adding, “The more diverse the people working on it, the closer we get to implementing these solutions and making progress on climate change.” Her new book, Climate Injustice, elaborates on her thesis further, using the stories of real people in the Global South to illustrate how exploitation, sexism, and colonialism have created a crisis with unequal impacts. Preorder it here.
Everyone who works in the climate space is familiar with the question posed in the title of this book. Entomologist Douglas W. Tallamy is one of the leading proponents of the native gardens movement, and in How Can I Help?, he answers a query implied in his own earlier book, 2009’s Bringing Nature Home: that “unless we restore native plants to our suburban ecosystems, the future of biodiversity in the United States is dim.” How Can I Help? is structured to address some of the most common questions Tallamy encounters during his lectures about how individuals can become directors of their own miniature national parks at home. Despite the daunting challenge of biodiversity loss, Tallamy offers actionable ideas for helping the planet, with conservation beginning in your backyard. Preorder it here.
If I had to make one prediction for 2025, it’d be that we will hear a lot more about per- and polyfluoroalkyl substances — that is, the “forever chemicals” commonly known as PFAS. The chemicals are found in everything from our dental floss to our clothes, but perhaps most disturbingly, they’re also found in our drinking water. In Poisoning the Well, The Hill staff writers Sharon Udasin and Rachel Frazin follow how PFAS got into our environment in the first place — a story of corporate greed and cover-ups that will be familiar to anyone aware of the fossil fuel playbook. Preorder it here.
Journalist Malcolm Harris’ last book was an “encyclopedic,” 700-page history of the city of Palo Alto, which became a fixture of best-of-the-year lists after it came out last February. Hot on its heels is Harris’ follow-up, What’s Left (which slow readers will be relieved to hear is less of a time commitment, at 320 pages). Harris’ intention with his new work is to explore “our remaining options for saving the world,” all of which involve varying degrees of collective action but which escalate from “progressive” to “socialist” to “revolutionary.” It’s one that you can be sure will have people talking. Preorder it here.
Alan Weisman’s hugely successful 2007 book, The World Without Us, speculated about humanity’s legacy if we suddenly disappeared. (Slate named it in 2019 as one of the 50 best nonfiction books in the past quarter-century.) Now, Weisman turns his attention to helping us stick around. “I am working on a book with kind of a vast topic, which is what are humanity’s best and most realistic hopes for getting through this very difficult century that we have,” he told Bangladesh’s Business Standard in 2022, while visiting the country during the research stage of his new project, Hope Dies Last. Weisman’s book took him all over the world — including the Korean de-militarized zone, the Netherlands, and the Marshall Islands — as he looked to speak with people across disciplines and professions about how we can approach our future. Bill McKibben has described the result as “a nonfiction companion to Kim Stanley Robinson’s Ministry for the Future.” Preorder it here.
In 1999, 24-year-old environmentalist Terence Unity Freitas traveled to Colombia to support the Indigenous U’wa people in resisting Occidental Petroleum, which was interested in drilling to extract some 1.5 billion barrels of oil from beneath the cloud forest. During what was supposed to be a weeklong visit, Freitas was kidnapped by the Armed Revolutionary Forces of Colombia (better known as FARC) along with two other Americans; their bodies were later found, bound and shot, just over the border in Venezuela. Twenty years later, Abby Reyes — the author of this memoir and Freitas’ partner at the time of his death — was recognized as a victim in Colombia’s truth and reconciliation process, resurfacing old griefs, reflections, and questions. “I bring the reader along in my demand for truth before the tribunal while awakening our collective awareness of what the truth demands of all of us in this era of ecological collapse and social transformation,” Reyes has said of her book. Preorder it here.
In Susanna Kwan’s debut novel, Awake in the Floating City, San Francisco is almost entirely underwater. Years of Biblical rain mean most people have already evacuated, but Bo — who lost her mother to the waters — lingers long past when sensible people have fled. Then one day, she receives a note from her neighbor, Mia, a 130-year-old woman who doesn’t want to leave the city, either; together, the two become the last people left in San Francisco. “What post-apocalyptic vision dares be so gorgeous?” marvels the author Meng Jin in one of the book’s early blurbs. Preorder it here.
Identical twin sister arborists teach the Women’s Tree Climbing Workshop. While that sounds like the beginning of a fairy tale, it’s the delightfully real-life starting point of journalist Marguerite Holloway’s Take to the Trees. “I was there to be in trees and to better understand them,” she writes of her attendance at the climbing workshop. “Trees and forests are facing existential threats because of climate change, but it can be a struggle to grasp the extent of the danger.” While not all of us have the time, ability, or inclination to take to such “gut-lurching” heights to learn more, we can read Take to the Trees, which records Holloway’s experience overcoming her fears and learning to appreciate the threat to American forests. Preorder it here.
Natural history is one of my favorite genres, and I’m especially excited for Sea of Grass by Minnesota Star Tribute journalists Dave Hage and Josephine Marcotty about one of the more neglected ecosystems of the genre: the American prairie. The grassland, which makes up a vast swath of the inner United States, is an incredible self-sustaining marvel — and nearly as biodiverse as a tropical rainforest. Yet many people today still either share European settlers’ disinterested view of the landscape or adopt a purely utilitarian one — which is why, after 200 years of plows, drainages, and nitrogen fertilizers, the effects have been “catastrophic.” Still, plenty of people who live on the prairie understand the importance of protecting such a special ecosystem, and Hage and Marcotty follow the effort to work alongside the land, not just against it. Sea of Grass earned a coveted blurb from McKibben, in which he calls the book “well worth the read.” Preorder it here.
We’ve been attempting to predict the weather for as long as humans have existed. Satellites, radars, and computers helped us make a significant leap forward from the days of farmer’s almanacs, but advances in artificial intelligence, drones, and the proliferation of home weather stations have created previously unimaginable opportunities for accuracy. (It’s a tech frontier we’ve covered quite a bit here at Heatmap, as well). In his book, Journalist Thomas E. Weber dives into the wild — and wildly important — world of forecasting, which will hit shelves just in time for hurricane season. Preorder it here.
Climate scientist and Shift Key guest Kate Marvel structured her highly anticipated first book around nine different emotional lenses for looking at climate change. That might seem like an odd angle for a scientist, since researchers are specifically taught not to bring emotion into their work. Still, she contends that just as there is no one way to feel about climate change, there is no one emotion we can tap to guide our response to it, either. From hope to pride to love, Marvel urges readers to get deep into their feels in Human Nature, which also touches on “Greek mythology,” “witches,” “geophysical fluid dynamics,” and “romantic comedies” — though according to Marvel, you won’t find “despair” in its pages. A 120,000-copy initial print run suggests the publisher, Ecco, believes this one will be a hit. Preorder it here.
Addressing climate change will require us to address how we eat, which accounts for a third of our carbon emissions. How to ameliorate that is one of the most significant questions we’re currently staring down as a species — and the topic of journalist and Heatmap contributor Michael Grunwald’s next book. Though the answers he finds might not always fit into our comfortable narratives — Grunwald recently ruffled feathers with a related piece for The New York Times defending industrial agriculture’s high yields on small parcels of land as our “best hope” — We Are Eating the Earth seems certain to reshape how its readers think about food, policy, and our thrice-daily consumptions. I can’t wait to be challenged by it. Preorder it here.
Science journalist Peter Brannen’s last book was about the five times life on our planet almost ended in mass extinctions. His follow-up, The Story of CO2 Is the Story of Everything, will zero in on the collection of molecules that have allowed life to exist in the first place. Of course, the great irony of carbon dioxide is that while it has made our planet habitable, fluctuations in its presence in the atmosphere are also responsible for things like almost killing our ancestors all off in an event known as the Great Dying — and now, of course, we have put our thumb on that scale. By looking backward, often by many millions of years, Brennen gives us a glimpse of our future. You’ll definitely want to preorder this book, if only because it will look great on the shelf next to Brennen’s other Eric Nyquist-designed cover. Preorder it here.
The Edge of Water, by Olufunke Grace Bankole (Feb. 4), a novel about a Nigerian immigrant to New Orleans whose destiny is shaped by a hurricane; Ends of the Earth Journeys to the Polar Regions in Search of Life, the Cosmos, and Our Future, by Neil Shubin (Feb. 4), about what we can learn about life and our future from our world’s most extreme landscapes; Dimming the Sun: The Urgent Case for Geoengineering, by Thomas Ramge (March 4), which makes the case for solar geoengineering to turn down the heat on a warming planet; Bad Nature, by Ariel Courage (April 1), an ecological disaster road-trip novel with a patricide plot; Shelter and Storm: At Home in the Driftless, by Tamara Dean (April 8), a memoir about living through the era of climate uncertainty; The Float Test, by Lynn Steger Strong (April 8), a family drama set against the backdrop of a sweltering Florida summer; Atomic Dreams: The New Nuclear Evangelists and the Fight for the Future of Energy, by Rebecca Tuhus-Dubrow (April 8), about the political reversal over nuclear’s place in the energy transition; Phytopolis: The Living City, by Stefano Mancuso (April 22), about how we can adapt our cities, greenly, to the challenges of the future; Carbon: The Book of Life, by Paul Hawken (March 18), about the element both responsible for life and perhaps the biggest threat against it; A Year of Compassion: 52 Weeks of Living Zero-Waste, Plant-Based, and Cruelty-Free, by Colleen Patrick-Goudreau (March 25), about how to protect the planet with small acts of kindness from home; The Lost Trees of Willow Avenue: A Story of Climate and Hope on One American Street, by Mike Tidwell (March 25), a chronicle of record year for climate change as seen on a single Washington, D.C., block; Ocean: Earth’s Last Wilderness, by David Attenborough and Colin Butfield (May 6), the story of one of the planet’s most critical features, co-authored by one of its most beloved natural historians; Arctic Passages: Ice, Exploration, and the Battle for Power at the Top of the World, by Kieran Mulvaney (May 13), about what the age of Arctic exploration can reveal to us about the future of the pole; Hot Takes: Every Journalist’s Guide to Covering Climate Change, by Sadie Babits (June 2), a handbook for incorporating climate science into your reporting.
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On Massachusetts’ offshore headwinds, Biden’s gas rules, and Australia’s free power
Current conditions: The Pacific Northwest is getting blasted with winds of up to 70 miles per hour • Heavy snow is coming this week for the higher elevations in New England and upstate New York • San Cristóbal de La Laguna in the Canary Islands saw temperatures surge to 95 degrees Fahrenheit.

Democratic candidates swept to victory in key races with implications for climate change on Tuesday night. In Virginia, Democrat Abigail Spanberger — who vowed to push forward with offshore wind, new nuclear reactors, and fusion energy — seized the governor’s mansion in the first major race to be called after polls closed. In New Jersey, Democrat Mikie Sherrill, who campaigned on building new nuclear plants and pressing the state’s grid operator, PJM Interconnection, to cut electricity prices, trounced her Republican opponent. In New York City, Democrat Zohran Mamdani, who said little about energy during his campaign but came out in the last debate in favor of nuclear power, easily beat back his two rivals for Gracie Mansion. Yet the Georgia Public Service Commission's incumbent Republican Tim Echols lost his race against Democrat Alicia Johnson, a defeat for a conservative who championed construction of the only two nuclear reactors built from scratch in modern U.S. history. In what one expert called a sign of a “seismic shift” on the commission, Peter Hubbard, another Democrat running to flip a seat on the commission, also won.
At a moment when the Trump administration is “disassembling climate policy across the federal government,” Heatmap’s Emily Pontecorvo wrote, “state elections are arguably more important to climate action than ever.”
A federal judge in Washington ruled Tuesday that the Trump administration can reconsider the Biden-era approval of SouthCoast Wind off the coast of Nantucket, Massachusetts. The decision, reported in The New York Times, is a setback for the joint venture between EDP Renewables and Engie, and handed the White House a victory in what we’ve called here the administration’s “total war on wind.” Judge Tanya S. Chutkan of the U.S. District Court for the District of Columbia ruled that the project developers would not “suffer immediate and significant hardship” if the Department of the Interior’s Bureau of Ocean Energy Management were allowed to reevaluate the project’s construction and operation permits.
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Meanwhile, the U.S. Court of Appeals for the D.C. Circuit upheld Biden-era Department of Energy efficiency rules for gas-fired residential furnaces and commercial water heaters in a ruling that rejected the gas industry’s challenge on Tuesday. “Overall, we find that DOE’s economic justification analysis and conclusions were robust,” the panel ruled, according to Bloomberg Law. The decision will maintain the status quo of how the agency enforces energy efficiency rules for the appliances. Under standards updated in 2021 and 2023, the Biden-era bureaucrats proposed raising efficiency levels to 95% for furnaces and using condensing model designs to heat water.
White House budget officials pressed the Environmental Protection Agency to expand its rollback of tailpipe regulations this summer as the agency sought to repeal the foundational policy that undergirds federal climate rules, E&E News reported. Documents the green newswire service obtained showed the White House Office of Management and Budget pushed the environmental regulator to weaken limits on vehicular pollution, including soot and smog-forming compounds in addition to planet-heating carbon. The EPA initially pushed back, but the documents revealed the staffers at OMB demanded the agency pursue a more aggressive rollback.
Australia launched a new plan to force energy companies to offer free electricity to households during the day to use excess solar power and push the grid away from coal and gas. The policy, called the “Solar Sharer” plan, aims to take advantage of the country’s vast rooftop solar panels. More than 4 million of Australia’s 10.9 million households have panels, and the capacity has overtaken the nation’s remaining coal-fired power stations. The proposal, the Financial Times reported, would also extend the benefits of distributed solar resources to the country’s renters and apartment dwellers.
For years, nuclear scientists have dreamed of harnessing atomic energy from thorium, potentially shrinking radioactive waste and reducing the risk of weapons proliferation compared to uranium. In the West, that has remained largely a dream. In China, however, researchers are vaulting ahead. This week, Chinese scientists announced a major breakthrough in converting thorium to uranium in a reactor. “This marks the first time international experimental data has been obtained after thorium was introduced into a molten salt reactor, making it the only operational molten salt reactor in the world to have successfully incorporated thorium fuel,” Shanghai Institute of Applied Physics of the Chinese Academy of Sciences said in a statement.
Rob and Jesse touch base with WeaveGrid CEO Apoorv Bhargava.
Data centers aren’t the only driver of rising power use. The inexorable shift to electric vehicles — which has been slowed, but not stopped, by Donald Trump’s policies — is also pushing up electricity use across the country. That puts a strain on the grid — but EVs could also be a strength.
On this week’s episode of Shift Key, Rob and Jesse talk to Apoorv Bhargava, the CEO and cofounder of WeaveGrid, a startup that helps people charge their vehicles in a way that’s better and cleaner for the grid. They chat about why EV charging remains way too complicated, why it should be more like paying a cellphone bill than filling up at a gas station, and how the AI boom has already changed the utility sector.
Shift Key is hosted by Robinson Meyer, the founding executive editor of Heatmap, and Jesse Jenkins, a professor of energy systems engineering at Princeton University.
Subscribe to “Shift Key” and find this episode on Apple Podcasts, Spotify, Amazon, YouTube, or wherever you get your podcasts.
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Here is an excerpt from our conversation:
Robinson Meyer: In your experience, are consumers willing to make this deal, where they get some money off on their power bill in order to change how their car works? Because it does seem to include a mindset change for people, where they’re going from thinking of their car as a machine — I mean, this is part of the broader transition to EVs. But there’s an even further mindset shift that seems to me like it would be required here, where you go from thinking about your car as a machine that you wholly own — that enables your freedom, that is ready to drive a certain amount of miles at any time — to a machine that enables you to have transportation services but also is one instantiation of the great big cloud of services and digital technologies and commodity energy products that surround us at any time.
Apoorv Bhargava: Yeah, I mean, look, I think we have seen faster adoption rates than any other consumer-side resource participating in energy has. So I feel very good about that. But ultimately, I think of this as a transition to the normal experience for folks who are going through what is a new experience altogether.
Again, similar to my cell phone plan, if this was just offered to me as a standard offering — you buy an EV, your utility offers you a plan, it’s called the EV plan — in the same way that we have EV time-of-use rates, quote-unquote. If you’re just offered an EV plan where it’s exactly the same thing — I’m going to make sure you’re fully charged every night in the way you want it to be charged, with the cleanest, cheapest, most reliable charging possible, and it’s just being taken care of.
I think what’s so hard for most folks to grok, is that the way this experience works is it’s supposed to be completely frictionless, right? You’re really supposed to not think about it. It’s actually only in the few moments where you need to change your 99% behavior to the 1% behavior — where you’re like, Oh, I need to go to the airport, or, Oh, I need to go on a road trip. That’s where you need to think about it. It’s flipped from thermostat management programs where you actually need to think about it actively in the moments where the grid is really strained.
Where we’ve overinvested, in my view —and this is a controversial view — we’ve overinvested in trying to make EVs be like gas stations or like the gas station model. We keep talking about it all the time. We’ve over-talked about range anxiety. The fact of the matter is 80% of charging still happens at home. Even in the long run, 30% of charging will happen in the workplace. 50- plus-percent will happen at home. It’s very little charging that’s gonna happen on fast charging. But we’ve talked so much, ad nauseam, about fast charging that we’ve actually forgotten that underpinning the iceberg of the electrification cost is the grid itself. And never before has the grid been so strained.
Mentioned:
Rob on how electricity got so expensive
Utility of the Future: An MIT Energy Initiative response to an industry in transition, December 2016
Previously on Shift Key: Utility Regulation Really Sucks
Jesse’s downshift; Rob’s upshift.
This episode of Shift Key is sponsored by …
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Uplight is a clean energy technology company that helps energy providers unlock grid capacity by activating energy customers and their connected devices to generate, shift, and save energy. The Uplight Demand Stack — which integrates energy efficiency, electrification, rates, and flexibility programs — improves grid resilience, reduces costs, and accelerates decarbonization for energy providers and their customers. Learn more at uplight.com/heatmap.
Music for Shift Key is by Adam Kromelow.
The self-described “ecosocialist” ran an ultra-disciplined campaign for New York City mayor. Once he’s in office, the climate issue could become unavoidable.
Zohran Mamdani, the New York state assemblyman, democratic socialist, and Democratic nominee, was elected mayor of New York City on Tuesday night.
Many factors fueled his longshot rise to Gracie Mansion — a congested primary field, a gleam-in-his-eyes approach to new media, and an optimistic left-wing worldview rendered newly credible by global tumult — but perhaps above all was a nonstop, months-long performance of bravura message discipline. Since the Democratic primary began in earnest earlier this year, Mamdani has harped in virtually every public appearance on what he has described as New York’s “affordability crisis,” promising to lower the city’s cost of living for working-class residents.
He hammered that message even as the election required him to play a shifting set of roles. During the primary, he set himself apart from a field overflowing with progressives by showcasing his differences with the Democratic Party. During the general election, he became the consummate Democrat, earning the votes of the party’s most loyal voters even as the former governor and one-time old-guard Democrat Andrew Cuomo ran an independent bid. Fittingly, Mamdani’s victory speech Tuesday night alluded to and remixed lines from socialists and liberal Democrats alike — including Cuomo’s father, New York’s former governor Mario Cuomo.
“A great New Yorker once said that while you campaign in poetry, you govern in prose,” Mamdani said, paraphrasing the elder Cuomo. “If that must be true, let the prose we write still rhyme, and let us build a shining city for all.”
So given all the notes he struck during the campaign, it is revealing to consider those Mamdani left unplayed. One in particular stands out: Throughout the long mayoral campaign, Mamdani rarely spoke about climate change — often doing so only when directly asked.
This might not seem meaningful on its face. Mamdani had a lot of issues he could focus on, after all. (He also spoke intermittently about, say, K-12 education, even though as mayor he will oversee the nation’s largest school district.)
But in light of his biography, Mamdani’s relative reticence on climate change stands out. During his early career in the state legislature, Mamdani defined himself in part through his climate activism, and by his view that New York should be “leading the country in our fight against the climate crisis,” as he said in a 2022 press release. He helmed some of the most aggressive recent activist efforts to shut down, block, and replace fossil fuel infrastructure in Gotham. They provide a window into where his mayoralty could go — and also illustrate the fraught politics of climate change in Year 1 of Trump 2.0.
From his first days in the New York State Assembly in 2021, Mamdani placed himself at the forefront of the debate over the future of fossil fuels in New York’s energy system. “When I ran for this office, it was on a platform of housing, justice, and energy for all,” he said in a statement soon after his election.
Many of his biggest policy proposals as a legislator focused on climate change. He backed the Build Public Renewables Act, a bill that empowers New York’s state power agency to develop wind and solar projects in order to meet the state’s climate goals. He resisted NRG Energy’s push to replace an aging natural gas peaker plant in Astoria, Queens, with a newer power plant that would still burn gas. And he opposed the expansion of natural gas pipelines into the state while cosponsoring the Clean Futures Act, which would, he said, ban all new natural gas power plants across New York.
Climate change was the issue, he said, at the very heart of his political identity. In July 2022, after the state assembly expired without a vote on the Build Public Renewables Act and amid a heat wave in New York, he called for a special session to pass the bill, deeming climate change a “human catastrophe.”
“There are a number of bills that I would love to pass tomorrow. I’m not calling for a special session for all of them,” he told Spectrum News. “The reason we have to call for this one is because climate change is not waiting.”
In its fight against the Queens power plant, his legislative office — working alongside the Stop NRG Coalition, an alliance of local residents, the Democratic Socialists of America, and traditional environmentalists such as Earthjustice and the Sierra Club — called 36,000 households and sent more than 7,800 postcards asking residents to reject the plant, Mamdani later said. Ultimately, locals filed more than 6,000 comments to oppose the proposed plant; when the New York Department of Environmental Conservation ultimately denied a key permit in October 2022, Mamdani claimed victory.
He was also clear about who had lost that fight: big corporations and fossil fuel-aligned capitalism. “This shows when we organize against corporations that put capital over the collective, we can win a world where we all live with dignity,” he said. “Stopping the Astoria power plant is an amazing victory towards a habitable planet and the clean future we all deserve.”
Many of Mamdani’s other climate efforts were ultimately successful. The Build Public Renewables Act passed in April 2023 as part of the state budget and was signed into law by Governor Kathy Hochul. The state has not passed the Clean Futures Act, although regulators have rejected other proposed fossil-fuel power plants across the state, citing its 2019 climate leadership law.
In a little-watched May 2021 video that gives a concentrated dose of Mamdani’s political vision at the time, he described himself not as a socialist, but as a “proud ecosocialist” who believed that electricity should be treated as a “public good.”
“Did you ever wonder why New York state only gets 5% of its energy from wind and solar?” he asked in the video. “It’s because of one word: capitalism.” The way to fight that capitalistic hold on energy production, he said, was with public power — government ownership and development of zero-carbon generation.
Even after those victories, Mamdani remained a proud champion of climate issues. As recently as a year ago, he suggested that activism and agitation around climate change was a key way that progressives could differentiate themselves from Trump in the eyes of the working class. At a rally in late November last year, shortly after a drought resulted in a rare brush fire that consumed 2 acres of the city’s beloved Prospect Park, he exhorted the New York Power Authority, or NYPA, to move faster to develop its pipeline of renewables projects — and framed credible climate action as essential to countering Trump’s rise.
“The climate crisis does not care about any of the reasons that are usually given so much weight in Albany. It doesn’t care if you want to blame the supply chain. It doesn’t care if a private company says it has reduced profitability. It cares only if you build out renewable infrastructure,” he said.
“If you want to know how to defeat the Donald Trump far-right movement, it’s by showing we actually have a workable alternative,” he continued. “Because if working class people can’t breathe the air, if they can’t afford to live in the city they call home because they can’t find a union job, and if they look around at their favorite parks being on fire, why would they trust us?”
“It is time to show them why,” he concluded. “It’s time for the Build Public Renewables Act.”
Mamdani has continued to push for NYPA to accelerate its renewables construction — he posted a video of the same rally to his Instagram feed in September, encouraging his followers to file public comments with New York state.
As recently as February 2025, he described New York City as facing an “existential moment of our climate crisis” at a candidate forum, and said that enforcing the city’s climate laws would require “taking on the real-estate industry.”
But in the months since, his earlier bold rhetoric — casting practical concerns as no object when it comes to climate action — has faded, and he has evinced more sympathy for landlords and homeowners who may bear decarbonization’s costs. He still describes climate change in existential terms, but has become far less likely to bring it up unbidden in his own speeches and media appearances.
As a major party mayoral candidate, too, Mamdani largely avoided framing climate action as a necessary antidote to Trumpism. When seeking to contrast himself with the president, he focused almost entirely on cost of living issues. In a Fox News appearance in October, Mamdani addressed Trump directly and said that he would work with him to address New Yorkers’ cost of living.
His campaign website’s only stated climate proposal is a “Green Schools” plan to renovate 500 public schools, turn 500 asphalt schoolyards into green spaces, and construct “resilience hubs” at 50 schools. Speaking with The Nation in April — in one of his few recent long-form interviews on climate policy — Mamdani set that plan within his broader campaign, saying “climate and quality of life are not two separate concerns. They are, in fact, one and the same.” Schools, he said, offer “an opportunity for comprehensive climate action.”
But his website has few other details about what climate actions he might like to pursue once he takes office as mayor. Indeed, the candidate who once blamed capitalism for New York’s failure to build renewables is now promising to establish a “Mom-and-Pop Czar” to cut fines on small businesses and speed up permitting. It also gives few clues about how Mamdani would handle decarbonization’s inevitable trade-offs. If achieving a faster renewables buildout led to higher energy prices for consumers and small businesses, what would he do?
Even in situations where his slogans could reasonably connect to some climate benefit, Mamdani did not complete the handshake. His website does not mention the pollution benefits of fast and free bus service, for instance, even though free transit in other campaigns has been described as a climate policy. His 25-minute victory speech, delivered to a jubilant crowd on Tuesday night, did not mention climate change at all.
Regardless of what he’s said, Mamdani will be required to take big actions on climate policy as mayor. The most significant will likely arise from an ordinance called Local Law 97, which requires New York City’s large buildings to reduce their greenhouse gas emissions by 2050. That law’s strict new set of pollution caps and penalties will start in 2029, and many landlords are set to pay big fines. During the second mayoral debate, Mamdani repeated that the “climate crisis is one of the most pressing issues facing this city,” and said he wants the law’s fines to be enforced. But he also added that “the city should make it easier for buildings to comply.”
Mamdani has also argued that the city and state should renew a set of tax breaks to make it cheaper for large residential buildings, like condos and co-ops, to meet the law’s targets, and has proposed creating a “one-stop shop” for Local Law 97 compliance in the city governance, according to his debate remarks and a memo about homeowner policy released by his campaign.
In replacing climate change with cost of living, Mamdani has moved closer to what appears to be an emerging consensus among his party. Recent autopsies of the 2024 election have argued that voters believed Democrats were too focused on issues like climate change and not enough on affordability or inflation. Mamdani’s relentless focus on near-term costs — and his embrace of clear, actionable, and frankly non-climate-related slogans — suggests that one young ecosocialist might now agree with them. His ultimate victory suggests that it wasn’t a bad gamble.