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Union of Concerned Scientists
@ucs.org
35K followers 1.3K following 2K posts
The Union of Concerned Scientists puts rigorous, independent science to work to solve our planet's most pressing problems.

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ucs.org
Curious about the meaning behind the utility poles in Bad Bunny’s Superbowl half-time show? There’s a long and troubled history of grid unreliability in Puerto Rico, and we’ve got the receipts.🧵👇
Bad Bunny performs onstage during the Apple Music Super Bowl LX Halftime Show at Levi's Stadium on February 08, 2026 in Santa Clara, California.
February 9, 2026 at 11:44 PM
Reposted by Union of Concerned Scientists
scovillepf.bsky.social
Recent college & grad school alumni:
Work for 6 to 9 months with 1 of over 2 dozen NGOs in DC on international peace & security issues, including nuclear arms control, peacebuilding, & diplomacy. Apply by Feb. 27 to @scovillepf.bsky.social for the fall '26 semester. scoville.org
January 27, 2026 at 7:30 PM
Reposted by Union of Concerned Scientists
ucsclimate.bsky.social
More disturbing news today about the removal of scientific evidence from decision-making processes in our federal government. Censoring educational materials about the climate crisis will not make it go away - it will just make our public institutions less equipped to deal with it.
Climate science removed from judicial manual after GOP complaints
Republican attorneys general argued the new chapter would put judges “firmly on one side” of climate lawsuits against the fossil fuel industry.
www.eenews.net
February 9, 2026 at 7:38 PM
ucs.org
¿Curios@ por saber qué significan los postes eléctricos que aparecieron en el show de Bad Bunny en el Super Bowl? Pues bien, Puerto Rico tiene una larga y turbulenta historia de falta de fiabilidad en el suministro eléctrico, y acá tenemos las pruebas… ¡con factura! (🧵)

📸Ishika Samant/ Getty
Bad Bunny actúa en el escenario durante el espectáculo de medio tiempo del Apple Music Super Bowl LX en el Levi’s Stadium el 8 de febrero de 2026 en Santa Clara, California.
February 9, 2026 at 10:28 PM
ucs.org
Our guest blogger, Dr. Susanne Moser, analyzes the ten largest outage events experienced in the central US over the last ten years and shares insights into how we can break this cycle.
The 10 Worst Power Outages in the Central United States Since 2020—And How We Build Back Better
Each of these “top ten” events lasted for multiple days and was associated with compound weather events occurring over a large geographic region.
blog.ucs.org
February 9, 2026 at 9:33 PM
ucs.org
UCS’s Jeremy Martin looks at the different incentives that make it attractive for oil companies to turn expensive vegetable oil and animal fat into less expensive diesel. Follow the money with him in his new blog:
Biofuel Incentives in Flux: Interactions Between Federal and California Policy
To make effective changes in a complex policy landscape, we’ll need to follow the money.
blog.ucs.org
February 9, 2026 at 8:12 PM
ucs.org
Thank you, @dorismatsui.bsky.social, for standing up for strong fuel-economy standards that save families money, cut pollution, and reduce oil dependence. Clean transportation is affordable transportation. #CleanerCars #RouteZero
February 9, 2026 at 6:01 PM
ucs.org
For decades, government investments in basic biomedical research have been the foundation for innovation across the private sector and academia. Trump administration’s attacks on federal science are hammering away at that foundation—and without it, the house won’t stand. Learn more:
Science, Innovation, and the National Institutes of Health
Failing to support independent agency science imperils the uptake of innovative drugs.
blog.ucs.org
February 8, 2026 at 5:12 PM
ucs.org
"El secuestro del presidente venezolano Nicolás Maduro por parte de la administración Trump con el fin de “hacer que el petróleo fluya” es como un ladrón que roba videograbadoras: está asumiendo un gran riesgo por un artículo cuyo valor es cada vez menor," escribe @kathymulvey.bsky.social, de UCS.
La apropiación ilegal e imperialista del petróleo venezolano por parte del presidente Trump es una apuesta perdida
Es como robar videograbadoras.
blog.ucs.org
February 7, 2026 at 4:55 PM
ucs.org
Despite the fact that wind is now the number one source of renewable electricity in the US, California has barely added any wind to its grid over the past decade. What happened? Read UCS's Mark Specht's new blog to find the answer:
California is Lagging on Wind Development. Why?
To achieve its clean energy goals, the state will need new wind power— far more than what its got today.
blog.ucs.org
February 6, 2026 at 7:01 PM
Reposted by Union of Concerned Scientists
ucsclimate.bsky.social
Artificial intelligence has been used in climate science for nearly 25 years. Read here to find out how and why.
How Do Climate Scientists Use Artificial Intelligence?
The AI used in climate research right now is much less energy intensive than the large language models like ChatGPT.
blog.ucs.org
February 5, 2026 at 12:07 AM
ucs.org
In October, the New York Times editorial board published an index tracking 12 categories of democratic erosion. Once countries begin taking steps away from democracy, the march often continues.
Opinion | Are We Losing Our Democracy? (Gift Article)
Donald Trump has wielded power as no previous president has.
www.nytimes.com
February 6, 2026 at 5:00 PM
ucs.org
In his blog, UCS’s @gkucs.bsky.social analyzes the recent announcement by Canadian Prime Minister Mark Carney in Davos, and what it could mean for US hegemony if other "middle powers" pursue their own strategic partnerships with China.
What Does the New Partnership Between Canada and China Tell Us about Future Chinese Foreign Policy?
If more countries join Canada in breaking from the US government, China could alter its policies and possibly help end the war in Ukraine.
blog.ucs.org
February 6, 2026 at 3:32 PM
Reposted by Union of Concerned Scientists
ucsclimate.bsky.social
📣NEW @ucs.org analysis documents how extreme weather events were behind all the largest power outages in the Central U.S. over the past decade, affecting hundreds of thousands of customers and demonstrating the urgent need to build a more resilient electric #grid.
Power After the Storm
As climate change can exacerbate extreme events the need for science-based, proactive grid modernization is more pressing than ever.
bit.ly
February 5, 2026 at 8:32 PM
ucs.org
Putting federal employees completely under the thumb of a political agenda weakens public trust in government and could result in less effective and equitable policies. It poses a monumental threat to evidence-based governance and democracy. Read More:
Trump Policy Threatens to Silence Scientists We Rely On
The Trump administration finalized a policy undermining the independence of federal employees.
www.ucs.org
February 5, 2026 at 9:39 PM
ucs.org
If you’ll be at #AAAS2026 in Phoenix (Feb 12–14), stop by and meet us at Booth 609! Come connect with our team, take action, and learn more about science-informed advocacy. Hope to see you there!

Learn more: act.ucsusa.org/45O19CA
Promotional graphic for the AAAS Annual Meeting in Phoenix, Arizona, February 12 to 14, 2026, inviting attendees to visit the Union of Concerned Scientists at Booth 609.
February 5, 2026 at 4:30 PM
Reposted by Union of Concerned Scientists
carlonimbus.bsky.social
Sharing my thoughts w/ ABC News about the challenges of the Winter Olympics w/ our warming climate.

I also want to highlight the worsening snow drought in the US West. 75% of its water supply comes from snow that melts in spring. Could be a big water scarcity issue.

abcnews.go.com/Internationa...
How climate change will make hosting the Winter Olympics more challenging
Hosting the Winter Olympics will be more challenging in the future.
abcnews.go.com
February 5, 2026 at 3:39 PM
ucs.org
February 4th was National Girls and Women in Sports Day. Research across scientific disciplines suggests that participation in sports enhances physical, social, and emotional health. Everyone deserves that opportunity.

➡️ www.womenssportsfoundation.org/get-involved...
Picture of Women in Sports Foundation celebrating that February 4th was National Girls and Women in Sports Day.
February 5, 2026 at 2:22 PM
Reposted by Union of Concerned Scientists
thirdactmaine.bsky.social
Third Act Maine came out in force for the Make Polluters Pay Day of Action, even though many of us had to get up early to dig cars out after a heavy snow storm & drive an hour or more, Maine elders showed up for the future of the planet!
@polluterspay.bsky.social

thirdact.org/maine/2026/0...
Mainers Demand World’s Largest Polluters Pay for Climate Damage
State and municipal leaders joined Mainers from across the state at the State House on January 27, 2026 for a Make Polluters Pay Action Day, calling on state lawmakers to...
thirdact.org
February 2, 2026 at 9:57 PM
Reposted by Union of Concerned Scientists
altacadia.bsky.social
A step in the right direction!
#MakePollutersPay
January 29, 2026 at 12:35 AM
ucs.org
🚌🛴Today is #TransitEquityDay, and it’s the right moment to highlight that, with the right investments, we can build a more reliable, accessible & cleaner transportation system that delivers substantial benefits to people across the US.

Learn how we can achieve that: act.ucsusa.org/4tdqtw1
A collage showing a diverse group of workers and advocates defending public transportation.
February 4, 2026 at 5:09 PM
ucs.org
📢NEW: A report from UCS out this morning shows that offshore wind can ease stress on the electric grid to help keep your lights—and heat—on during blistering winter temperatures.

Read the report:
New England’s Offshore Wind Solution
The New England winter is no match for what offshore wind offers.
www.ucs.org
February 4, 2026 at 3:58 PM
ucs.org
A necessary reflection, one month after the Trump administration’s illegal military actions in Venezuela. Here’s the English version of UCS’s Juan Declet-Barreto’s new blog:
February 3, 2026 at 9:25 PM
ucs.org
🤖🌍 How do climate scientists use Artificial Intelligence in their work? UCS's @marc-alessi.bsky.social breaks down this question in his new blog.

Read it here: act.ucsusa.org/3ZOeJlW
Illustration of a laptop with an AI chip icon at the center, connected by data lines to rows of server racks on both sides, above a quote about the need for transparent, reproducible AI methods in climate science by UCS scientist Marc Alessi. The quote reads: “We as scientists need to do more to build trust in AI. There needs to be a clear history of rigorous evaluation of AI in science; there need to be published, open access, and reproducible AI research methods; and there needs to be explicit documentation of how confident we are in the data the AI models learn patterns from. “
February 3, 2026 at 7:36 PM
Reposted by Union of Concerned Scientists
ucsclimate.bsky.social
Congrats to the Illinois Make Polluters Pay coalition on last week's kickoff rally in support of the state's newly introduced climate superfund bill. Despite the freezing temperatures, Chicago showed out in force to say #MakePollutersPay!

📸Photo credit: Vanessa Bly for NRDC @nrdc.org
A crowd stands in front of a building with a yellow and purple banner reading "Make Polluters Pay." People pose for a photo holding handmade signs reading "Make Polluters Pay," "Make Big Oil Pay," "Pollution Hurts Real People," and "Big Oil Profits, Our Communities Suffer." Three people hold a yellow banner with black text, with a painted on image of oil dripping from the top. It reads "Polluters Profit, Illinois Pays." People hold a banner reading "Make Polluters Pay" over the edge of a bridge, with the water visible below. Street signs on the bridge read "Opera Bridge, Madison Street."
February 3, 2026 at 2:41 PM