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Harry Stevens

@harrystevens.bsky.social
13K followers 1.2K following 156 posts

Climate and graphics at @nytimes.com Email me and check my work: harry.stevens@nytimes.com

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Harry Stevens @harrystevens.bsky.social · 07/07/2026
I just released a major update to d3-regression, a JavaScript library for calculating and rendering statistical regressions: ✅ TypeScript declarations ✅ Logistic and sigmoidal regressions ✅ Speed improvements ✅ Modern ECMAScript ✅ Bug fixes Try it: observablehq.com/@harrysteven...
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Lyndsey Layton @lyndseylayton.bsky.social · 04/06/2026
NEW: The Trump administration is poised to do what no other nation has: permit industrial mining of the ocean floor. Here's how that would work, from @harrystevens.bsky.social @sachimulkey.bsky.social and junho lee www.nytimes.com/interactive/...
nytimes.com
See What Deep-Sea Mining Actually Looks Like, Over 2 Miles Down (Gift Article)
A mining company sent an advanced ship to try to vacuum up valuable minerals from the deep ocean. Here’s how it worked.
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Vikas Bajaj @vikasbajaj.bsky.social · 18/03/2026
In Ohio and across the country, tech companies are going all out to build off-grid natural gas power plants for their A.I. data centers. Great story by @rebeccafelliott.bsky.social and @harrystevens.bsky.social www.nytimes.com/interactive/...
nytimes.com
Why Tech Giants Are Ditching the Power Grid (Gift Article)
Seeking power for data centers, Meta and other companies plan to use equipment that is expensive and polluting.
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Harry Stevens @harrystevens.bsky.social · 18/03/2026
As @michael-thomas.bsky.social and his team at Cleanview found, most of the onsite power generation capacity at U.S. data centers will come from natural gas. This equipment is often more expensive and polluting than equipment used in typical natural gas plants. www.nytimes.com/interactive/...
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Harry Stevens @harrystevens.bsky.social · 18/03/2026
It's not just in New Albany. More than half of the gas plants being built to serve data centers will be off grid, according to data from @globalenergymon.bsky.social. Gift link: www.nytimes.com/interactive/...
A map of the United States showing natural gas plants that have been announced or are under construction. Plants that will not be connected to the grid are highlighted in blue, and grid-connected plants are in gray.
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Harry Stevens @harrystevens.bsky.social · 18/03/2026
I have a new story with @rebeccafelliott.bsky.social on how Meta and others, seeking power for data centers, are building their own power plants. These projects have transformed places like New Albany, Ohio, where farmland has given way to industry. Gift link: www.nytimes.com/interactive/...
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Alyssa Fowers @alyssafowers.bsky.social · 04/02/2026
I was laid off from the Washington Post today, along with hundreds (!!!) of incredible colleagues. If you need a data journalist, chart designer, or wacky-idea-specialist, give me a shout!
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Robinson Meyer @robinsonmeyer.bsky.social · 23/12/2025
The Trump admin has started to realize batteries are an important general purpose technology. www.nytimes.com/2025/12/23/c...
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USA TODAY @usatoday.com · 17/12/2025
Exclusive: The Trump administration is moving to dismantle the National Center for Atmospheric Research in Colorado, according to a senior White House official, taking aim at one of the world's leading climate research labs.
bit.ly
Trump moves to dismantle major US climate research center in Colorado
The Trump administration is breaking up the National Center for Atmospheric Research, taking aim at one of the world's leading climate research labs.
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Martijn Rasser @martijnrasser.bsky.social · 13/12/2025
The question isn't whether fusion will arrive—it's who gets there first, and what that means for the rest of the century. #FusionEnergy #EnergyTransition #Science www.nytimes.com/2025/12/13/c...
nytimes.com
Clean, Limitless Energy Exists. China Is Going Big in the Race to Harness It.
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Pedro de las Heras Quirós @pheras.bsky.social · 13/12/2025
"In America, the lack of government support is one reason so many fusion researchers are joining start-ups, Dr. Liu said. Chinese officials, by contrast, are putting significant resources into a possible “ultimate solution” to humankind’s energy needs" www.nytimes.com/2025/12/13/c...
In America, the lack of government support is one reason so many fusion researchers are joining start-ups, Dr. Liu said.

Chinese officials, by contrast, are putting significant resources into a possible “ultimate solution” to humankind’s energy needsIn America, the lack of government support is one reason so many fusion researchers are joining start-ups, Dr. Liu said.

Chinese officials, by contrast, are putting significant resources into a possible “ultimate solution” to humankind’s energy needs
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The New York Times - Breaking News, US News, World News and Vid… @nytimes.com.web.brid.gy · 13/12/2025
nytimes.com
Clean, Limitless Energy Exists. China Is Going Big in the Race to Harness It.
Beijing is pouring vast resources into fusion research, while the U.S. wants private industry to lead the way. The winner could reshape civilization.
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Seaver Wang @wang-seaver.bsky.social · 24/10/2025
Great @bradplumer.bsky.social @harrystevens.bsky.social piece on China's nuclear ambition. I'm biased but I think a good satellite comparison is worth 1000 words. Incidentally, the score for aluminum smelters built since 1990 would be ~50-60 for China, 0 for the US. www.nytimes.com/interactive/...
nytimes.com
How China Raced Ahead of the U.S. on Nuclear Power (Gift Article)
The United States was once the undisputed leader in atomic energy. Now it is trying to catch up.
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The Upshot @upshot.nytimes.com · 23/10/2025
From NYT Climate, via @harrystevens.bsky.social and @bradplumer.bsky.social www.nytimes.com/interactive/...
nytimes.com
How China Raced Ahead of the U.S. on Nuclear Power
The United States was once the undisputed leader in atomic energy. Now it is trying to catch up.
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Conrad Hackett @conradhackett.bsky.social · 23/10/2025
Nuclear reactors built or under construction since 2013 US: 2 China: 46
nytimes.com
How China Raced Ahead of the U.S. on Nuclear Power
The United States was once the undisputed leader in atomic energy. Now it is trying to catch up.
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Harry Stevens @harrystevens.bsky.social · 08/08/2025
The EPA said it will stop updating a database that companies use to calculate the greenhouse gas emissions from their supply chains. In July, EPA suspended the database's lead scientist because he signed a letter criticizing the Trump administration. www.nytimes.com/2025/08/08/c...
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Glen Peters @glenpeters.bsky.social · 28/07/2025
Based on fossil fuel growth rates from the IEA Coal Mid-Year Update, July Oil Market Report, & Gas Market Report Q3, fossil CO2 emissions would grow around 0.8% in 2025, reaching another record high... We are only half way through the year, but don't build too much expectation for peak emissions.
Figure showing coal, oil, and gas emissions from 1960, with a little red dot for 2025, with 0.5% growth in coal, 1% in oil, 1.6% in gas, and -1.1% for cement. These are all leap year adjusted since 2024 had one more day than 2025...
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The Upshot @upshot.nytimes.com · 09/06/2025
About a quarter of the world’s oceans are experiencing temperatures that qualify as a marine heat wave. www.nytimes.com/2025/06/09/c...
nytimes.com
See How Marine Heat Waves Are Spreading Across the Globe
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whet moser @whetmoser.com · 09/06/2025
wow, this is really good mapping www.nytimes.com/2025/06/09/c...
nytimes.com
See How Marine Heat Waves Are Spreading Across the Globe
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Harry Stevens @harrystevens.bsky.social · 07/06/2025
github.com/HarryStevens...
github.com
GitHub - HarryStevens/d3-geo-hemispheres: A map projection for a vertical world.
A map projection for a vertical world. Contribute to HarryStevens/d3-geo-hemispheres development by creating an account on GitHub.
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Harry Stevens @harrystevens.bsky.social · 07/06/2025
github.com/HarryStevens...
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Brad Plumer @bradplumer.bsky.social · 13/05/2025
Since the IRA passed, companies have made plans to invest over $843 billion in clean energy projects. But just one-third of that has actually been invested, new data shows. Much of the rest is now at risk. On the new House Republican plan to dismantle the IRA, with @harrystevens.bsky.social
nytimes.com
A Clean Energy Boom Was Just Starting. Now, a Republican Bill Aims to End It.
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Dean Napolitano @dinonapolitano.bsky.social · 27/04/2025
Rebecca Dzombak, Max Bearak & @harrystevens.bsky.social look at the possible long-term consequences from seabed mining. “Part of the challenge in understanding potential effects is that the pace of life is slow on the seafloor. Deep-sea fish can live hundreds of years. Corals can live thousands.”
nytimes.com
The Trump Administration Wants Seafloor Mining. What Does That Mean?
A recent executive order would accelerate mining in little-understood undersea ecosystems.
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Harry Stevens @harrystevens.bsky.social · 27/04/2025
The azimuthal equal-area projects the sphere onto a disk and preserves area across the projection. You can display the whole planet, but latitudes far from the center get very distorted. The clipped two-hemisphere approach avoids the distortion and fits nicely on a phone.
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Harry Stevens @harrystevens.bsky.social · 27/04/2025
I first saw this last year in a map by @bananafish.bsky.social. Not sure if he invented it or saw it somewhere else. www.washingtonpost.com/climate-envi...
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Harry Stevens @harrystevens.bsky.social · 27/04/2025
A cylindrical or pseudocylindrical (in this case Patterson's Natural Earth) projection will start looking real scrunchy at around 600 pixels, but the stacked Lamberts work great down to 300 pixels — as narrow as you'll ever need.
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Harry Stevens @harrystevens.bsky.social · 27/04/2025
A trick for fitting world maps on phones: Stack two azimuthal equal-area projections, clipped at 90° longitude, each one rotated 180° from the other. The bottom map covers the top's Antarctica, which reduces the total height and looks nice. As seen in www.nytimes.com/2025/04/25/c...
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C4ADS @c4ads.org · 22/04/2025
ICYMI: C4ADS Program Director Krista Rasmussen spoke to @harrystevens.bsky.social about #China’s growing control of critical #mineral supply chains — building on our recent Refining Power investigation into ownership of Indonesian nickel refineries. From @nytimes.com 👇 buff.ly/qJuK213
buff.ly
Here’s What to Know About Rare Earth Minerals and Renewable Energy
The shift to cleaner power needs resources from China. An export ban just cut off some supplies.
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Harry Stevens @harrystevens.bsky.social · 19/03/2025
Jury Finds Greenpeace Liable for Hundreds of Millions in Damages A lawsuit by pipeline giant Energy Transfer claimed Greenpeace had played a major, costly role in protests nearly a decade ago. Greenpeace has said a loss could put it out of business. by Karen Zraick www.nytimes.com/2025/03/19/c...
nytimes.com
Jury Finds Greenpeace Liable for Hundreds of Millions in Damages
A lawsuit by pipeline giant Energy Transfer claimed Greenpeace had played a major, costly role in protests nearly a decade ago. Greenpeace has said a loss could put it out of business.
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Harry Stevens @harrystevens.bsky.social · 06/03/2025
🦋 The study didn't investigate causes, but habitat disruption and pesticides likely contributed to declines. Climate change may have played a role: species saw larger drops in the south of their ranges, suggesting northward migration w/ temp. increase. www.nytimes.com/interactive/... 3/3
nytimes.com
See How Butterfly Numbers Are Dropping Near You (Gift Article)
Populations are falling in the United States, a new study has found. Look up what’s happening in your area.
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Harry Stevens @harrystevens.bsky.social · 06/03/2025
🦋 This is the first study to combine butterfly observations from thousands of surveys across the country to create a complete picture of U.S. butterfly trends. Of 342 species, 245 suffered declines of at least 10 percent. Read the story here: www.nytimes.com/interactive/... 2/3
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Harry Stevens @harrystevens.bsky.social · 06/03/2025
🦋 In 20 years, the contiguous U.S. lost 22 percent of its butterflies, according to a groundbreaking new study published today. We got the data, and I made a tool that lets you find out what's happening with butterfly species in your town. Gift link: www.nytimes.com/interactive/... 1/3
nytimes.com
See How Butterfly Numbers Are Dropping Near You (Gift Article)
Populations are falling in the United States, a new study has found. Look up what’s happening in your area.
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Andrew Freedman @afreedma.bsky.social · 21/02/2025
The US won't have an official govt delegation at an upcoming, key UN climate science meeting next week. (Story led by @mccuri.bsky.social ) **Whether this signals a broader federal disengagement from int'l climate research is not yet clear... www.axios.com/2025/02/20/u...
axios.com
Scoop: U.S. delegation pulled from key U.N. climate science meeting
The IPCC meeting in China is slated to determine the content in the group's next series of reports.
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Harry Stevens @harrystevens.bsky.social · 19/02/2025
Nikola, the EV startup that once enjoyed a surging stock price, has filed for bankruptcy after struggling to turn its plans for electric and hydrogen trucks into a viable business. www.nytimes.com/2025/02/19/b...
nytimes.com
Nikola, Electric Truck Maker, Files for Bankruptcy
The company, which once enjoyed a surging stock price, struggled to turn its plans for electric and hydrogen trucks into a viable business.
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Harry Stevens @harrystevens.bsky.social · 14/02/2025
The Energy Department has begun laying off staff — around 1,000 workers — as part of Trump's purge of the federal workforce www.nytimes.com/2025/02/14/u...
nytimes.com
Layoffs Begin at Energy Department, Part of Trump Purge
Mass firings have rocked multiple agencies as President Trump and Elon Musk accelerate plans to drastically slash and reshape the federal work force.
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Harry Stevens @harrystevens.bsky.social · 14/02/2025
Update: The State Dept.'s plan to spend $400 million on armored Teslas, which was made after Trump was inaugurated but before he took office, has been suspended www.nytimes.com/2025/02/13/u...
nytimes.com
State Dept. Suspends Plan to Buy Armored Vehicles From Elon Musk’s Tesla
Vehicles made by Elon Musk’s company were on a purchase list issued before Donald Trump was inaugurated and before Mr. Musk became one of the president’s top advisers.
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Harry Stevens @harrystevens.bsky.social · 13/02/2025
The State Department plans to spend $400 million on armored Cybertrucks from Elon Musk’s Tesla www.nytimes.com/live/2025/02...
nytimes.com
State Dept. Plans $400 Million Purchase of Armored Tesla Cybertrucks
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Harry Stevens @harrystevens.bsky.social · 10/02/2025
Thanks Shravya
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Andrew Freedman @afreedma.bsky.social · 09/02/2025
NEW: @noaa.gov offices have been asked to search their grants for climate-related keywords, among other executive order-related terms. This could put climate grant-funding in the crosshairs if/once the judicial order holding the funding freeze back is lifted. www.axios.com/2025/02/09/n...
axios.com
NOAA told to search its grants for climate change terms
The search would provide a list of NOAA's climate change-related grants.
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Harry Stevens @harrystevens.bsky.social · 10/02/2025
Trump Is Freezing Money for Clean Energy. Red States Have the Most to Lose. www.nytimes.com/2025/02/10/c...
nytimes.com
Trump Is Freezing Money for Clean Energy. Republican States Have the Most to Lose. (Gift Article)
About 80 percent of manufacturing investments spurred by a Biden-era climate law have flowed to Republican districts. Efforts to stop federal payments are already causing pain.
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Harry Stevens @harrystevens.bsky.social · 10/02/2025
NEW: Trump is freezing money for clean energy — batteries, EVs, renewables, heat pumps, and more. Nearly 80% of manufacturing investments spurred by the Inflation Reduction Act have flowed to Republican congressional districts. w/ Lisa Friedman & @bradplumer.bsky.social 👇 Gift link in reply
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Sam @samd.bsky.social · 14/01/2025
this is incredible stuff. most state DOTs would spend tens of billions on highway expansions to try and see numbers like this (that wouldn’t even pan out anyway thanks to induced demand lol)
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Harry Stevens @harrystevens.bsky.social · 06/01/2025
At this rate we'll bend the aerosol cooling curve back up to 0 long before we bend the greenhouse warming curve back down.
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Harry Stevens @harrystevens.bsky.social · 18/12/2024
Startup company Commonwealth Fusion Systems aims to build its first fusion power plant in Richmond, VA, to begin generating carbon-free electricity in the early 2030s. www.nytimes.com/2024/12/17/c...
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Robinson Meyer @robinsonmeyer.bsky.social · 16/12/2024
Permitting reform is dead in the 118th Congress, per Josh Siegel at Politico
MANCHIN concedes on permitting, concluding a 3- year push to pass a bill easing buildout of energy projects after IRA: "It's a shame that our country is losing this monumental opportunity to advance
commonsense, bipartisan permitting reform
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Harry Stevens @harrystevens.bsky.social · 16/12/2024
“You have to make sure your numbers are correct before you scare the pants off people.”
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Nat Bullard @nathanielbullard.com · 13/12/2024
“geothermal energy could meet 15% of global electricity demand growth between now and 2050 if project costs continue to decline. This would mean the deployment of as much as 800 gigawatts of geothermal capacity worldwide” www.iea.org/news/technol...
iea.org
Technology breakthroughs are unlocking geothermal energy’s vast potential in countries across the globe - News - IEA
Technology breakthroughs are unlocking geothermal energy’s vast potential in countries across the globe - News from the International Energy Agency
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