Union of Concerned Scientists
@ucs.org
The Union of Concerned Scientists puts rigorous, independent science to work to solve our planet's most pressing problems.
ucs.org
ucs.org
After four years of monitoring disinformation around the annual UN COP negotiations, CAAD’s pre-COP30 report represents a turning point in the struggle to confront climate disinformation. Read the report and sign up for regular disinformation bulletins during #COP30 here: act.ucsusa.org/4ozdxOj
Climate Action Against Disinformation |
Deny, Deceive, Delay: Demystified
act.ucsusa.org
November 10, 2025 at 9:17 PM
After four years of monitoring disinformation around the annual UN COP negotiations, CAAD’s pre-COP30 report represents a turning point in the struggle to confront climate disinformation. Read the report and sign up for regular disinformation bulletins during #COP30 here: act.ucsusa.org/4ozdxOj
For the past 75 years, the National Science Foundation (NSF) has quietly powered innovations that shape our daily lives, from the classroom to the smartphone, from the weather report to the internet. Celebrate the NSF with Carlos Javier Martinez. act.ucsusa.org/3JuAItP
What Do Duolingo, The Magic School Bus, and James Bond Have in Common? The US National Science Foundation
Public investment in science yields public good.
act.ucsusa.org
November 10, 2025 at 8:22 PM
For the past 75 years, the National Science Foundation (NSF) has quietly powered innovations that shape our daily lives, from the classroom to the smartphone, from the weather report to the internet. Celebrate the NSF with Carlos Javier Martinez. act.ucsusa.org/3JuAItP
The synergies between domestic policies and global climate ambition are crucial. Acting together by boosting renewable energy and transitioning away from fossil fuels, we can bend the global emissions curve meaningfully and limit the rise in global average temperatures. act.ucsusa.org/4441fF8
Why COP 30 in Brazil Matters for a Thriving Economy and a Safe, Livable Planet
The rest of the world must leave the US behind and pursue ambitious consensus on switching to cheap clean energy.
act.ucsusa.org
November 10, 2025 at 6:32 PM
The synergies between domestic policies and global climate ambition are crucial. Acting together by boosting renewable energy and transitioning away from fossil fuels, we can bend the global emissions curve meaningfully and limit the rise in global average temperatures. act.ucsusa.org/4441fF8
What would it look like if the world came together to prevent the fossil fuel industry from obstructing science-informed public policy and its implementation? UCS's Kathy Mulvey decided to imagine what a COP free from fossil fuel industry influence would look like. act.ucsusa.org/4hSh9IA
Imagining a COP Free from Fossil Fuel Industry Influence
COP30 will be a pivotal moment in global efforts to limit the worst impacts of climate change and advance a just transition centering workers, communities, and Indigenous Peoples.
act.ucsusa.org
November 10, 2025 at 3:52 PM
What would it look like if the world came together to prevent the fossil fuel industry from obstructing science-informed public policy and its implementation? UCS's Kathy Mulvey decided to imagine what a COP free from fossil fuel industry influence would look like. act.ucsusa.org/4hSh9IA
The Science for Public Good Fund is back! Apply today for up to $1500 to support your science advocacy efforts.
📌 Apply here: act.ucsusa.org/4nCzPhl
📌 Apply here: act.ucsusa.org/4nCzPhl
November 10, 2025 at 5:00 AM
The Science for Public Good Fund is back! Apply today for up to $1500 to support your science advocacy efforts.
📌 Apply here: act.ucsusa.org/4nCzPhl
📌 Apply here: act.ucsusa.org/4nCzPhl
¿Recuerdas la primera vez vez que escuchaste que el planeta se está calentando por la acción humana? ¿O recién te estás enterando? Las compañías de combustibles fósiles lo supieron hace 70 años… e hicieron lo posible para evitar que tú lo supieras.
Conoce más en la 2da parte de nuestro podcast:
Conoce más en la 2da parte de nuestro podcast:
El crimen del siglo-2ª parte
Un explosivo informe de UCS llamado "Décadas de engaños" revela pruebas documentadas de lo que podría llamarse…el crimen del siglo.
es.ucs.org
November 9, 2025 at 5:00 PM
¿Recuerdas la primera vez vez que escuchaste que el planeta se está calentando por la acción humana? ¿O recién te estás enterando? Las compañías de combustibles fósiles lo supieron hace 70 años… e hicieron lo posible para evitar que tú lo supieras.
Conoce más en la 2da parte de nuestro podcast:
Conoce más en la 2da parte de nuestro podcast:
50% Off Sale: Celebrate this off-year election cycle by electing to show your support for candidates who believe in science with this no-frills, just facts, bumper sticker. Because when facts and evidence are on the ballot, everyone wins.
50% Off Sale: Vote Facts & Evidence bumper sticker
Elect to show your support for candidates who believe in science with this no-frills, just facts, bumper sticker. Because when facts and evidence are on the ballot, everyone wins.
ucs-store.myshopify.com
November 8, 2025 at 5:00 AM
50% Off Sale: Celebrate this off-year election cycle by electing to show your support for candidates who believe in science with this no-frills, just facts, bumper sticker. Because when facts and evidence are on the ballot, everyone wins.
Delta Merner takes us inside the Intergovernmental Panel on Climate Change (IPCC) plenary meeting last month in Lima, Peru. That distinction matters because in a plenary (vs expert meeting) it’s the political dynamics that often shape outcomes, and that was evident throughout the week.
Reflections from the IPCC Plenary in Lima on the Road to COP30
Seeing this level of gridlock raises concerns about what lies ahead, especially as we approach COP30 in Belém, where the stakes for global cooperation will be far higher.
blog.ucs.org
November 7, 2025 at 9:09 PM
Delta Merner takes us inside the Intergovernmental Panel on Climate Change (IPCC) plenary meeting last month in Lima, Peru. That distinction matters because in a plenary (vs expert meeting) it’s the political dynamics that often shape outcomes, and that was evident throughout the week.
The clear takeaway from Energy Analyst Mike Jacobs' study of data center transmission costs from earlier this fall is that data centers should pay for their grid connections—but instead, they’re passing them onto you. Total costs shifted to consumers in '24 was at least $4.3B in just 7 states.
Finally, Something Everyone Agrees On: Data Centers Should Cover Their Own Costs
Data centers should pay the cost of their grid connections—but instead, they’re passing those expenses to you.
act.ucsusa.org
November 7, 2025 at 6:57 PM
The clear takeaway from Energy Analyst Mike Jacobs' study of data center transmission costs from earlier this fall is that data centers should pay for their grid connections—but instead, they’re passing them onto you. Total costs shifted to consumers in '24 was at least $4.3B in just 7 states.
Read Chanese Forte's interview with renowned nuclear physicist and environmental epidemiologist Dr. Jan Beyea about the Trump administration's executive orders upending foundational radiation science, known as LNT and ALARA. blog.ucs.org/chanese-fort...
Will Politics Put More People’s Health at Risk from Radiation Exposure?
The Trump administration's attack on the science underlying regulations that protect the public from the health risks of radiation exposure could affect many government rules.
blog.ucs.org
November 7, 2025 at 4:46 PM
Read Chanese Forte's interview with renowned nuclear physicist and environmental epidemiologist Dr. Jan Beyea about the Trump administration's executive orders upending foundational radiation science, known as LNT and ALARA. blog.ucs.org/chanese-fort...
The essential question policy makers must answer is how much of the vegetable oil, corn, animal fat, and other resources that can be used to make biofuels should be made available for fuel use. Jeremy Martin shares what he's learned over 18 yrs in biofuel policy. act.ucsusa.org/3LMxG4C
Lessons Learned from 18 Years of Arguing About Indirect Land Use Change
The complexity and opacity of the existing framework are undermining its efficacy as a land use safeguard.
act.ucsusa.org
November 7, 2025 at 2:29 PM
The essential question policy makers must answer is how much of the vegetable oil, corn, animal fat, and other resources that can be used to make biofuels should be made available for fuel use. Jeremy Martin shares what he's learned over 18 yrs in biofuel policy. act.ucsusa.org/3LMxG4C
Reposted by Union of Concerned Scientists
My brilliant @ucs.org colleague Chanese Forté interviews two other brilliant folks, Dr. Jan Beyea, and @nucsafetyucs.bsky.social, on the Trump administration's moves to undermine sensible, science-based limits on radiation exposure. Team Trump seems to wants to promote nuclear power at any cost.
Will Politics Put More People’s Health at Risk from Radiation Exposure?
The Trump administration's attack on the science underlying regulations that protect the public from the health risks of radiation exposure could affect many government rules.
blog.ucs.org
November 6, 2025 at 7:18 PM
My brilliant @ucs.org colleague Chanese Forté interviews two other brilliant folks, Dr. Jan Beyea, and @nucsafetyucs.bsky.social, on the Trump administration's moves to undermine sensible, science-based limits on radiation exposure. Team Trump seems to wants to promote nuclear power at any cost.
ExxonMobil's new lawsuit against California’s agenda-setting climate disclosure laws underscores what decades of investigation and litigation have shown: they will go to nearly any length to avoid accountability for their role in the climate crisis. blog.ucs.org/laura-peters...
WTH, XOM? ExxonMobil Again Sues to Dodge Accountability
Large fossil fuel and cement companies are responsible for the vast majority of the emissions that science shows are driving changes in the earth’s climate.
blog.ucs.org
November 6, 2025 at 8:26 PM
ExxonMobil's new lawsuit against California’s agenda-setting climate disclosure laws underscores what decades of investigation and litigation have shown: they will go to nearly any length to avoid accountability for their role in the climate crisis. blog.ucs.org/laura-peters...
Reposted by Union of Concerned Scientists
In his latest blog, my colleague @ucsdave.bsky.social clarifies how much the trucking industry damages our roadways, and how the public subsidizes them by around $88 billion a year to do so (not to mention over $170 billion/year in health and climate costs)
blog.ucs.org/dave-cooke/t...
blog.ucs.org/dave-cooke/t...
Trucks Cause the Lion’s Share of Road Damage—and Their Industry Wants You to Keep Paying for It
There is no reason for US taxpayers to foot the bill for a trillion-dollar per year industry.
blog.ucs.org
November 5, 2025 at 3:36 PM
In his latest blog, my colleague @ucsdave.bsky.social clarifies how much the trucking industry damages our roadways, and how the public subsidizes them by around $88 billion a year to do so (not to mention over $170 billion/year in health and climate costs)
blog.ucs.org/dave-cooke/t...
blog.ucs.org/dave-cooke/t...
Overshooting the 1.5°C degree temperature target, even temporarily, means greater risks of severe climate impacts, some of which may be irreversible. Irreversible and, in some cases, fatal, impacts are only part of what's so concerning. A 🧵 based on new UCS blog:
November 6, 2025 at 4:21 PM
Overshooting the 1.5°C degree temperature target, even temporarily, means greater risks of severe climate impacts, some of which may be irreversible. Irreversible and, in some cases, fatal, impacts are only part of what's so concerning. A 🧵 based on new UCS blog:
Reposted by Union of Concerned Scientists
No one should have to choose between groceries, medicine, or heat this winter.
Call Gov. Beshear TODAY and tell him to put an immediate moratorium on utility disconnections during the government shutdown. 502-564-2611.
Learn more: buff.ly/vMsTno7
Call Gov. Beshear TODAY and tell him to put an immediate moratorium on utility disconnections during the government shutdown. 502-564-2611.
Learn more: buff.ly/vMsTno7
November 5, 2025 at 2:00 PM
No one should have to choose between groceries, medicine, or heat this winter.
Call Gov. Beshear TODAY and tell him to put an immediate moratorium on utility disconnections during the government shutdown. 502-564-2611.
Learn more: buff.ly/vMsTno7
Call Gov. Beshear TODAY and tell him to put an immediate moratorium on utility disconnections during the government shutdown. 502-564-2611.
Learn more: buff.ly/vMsTno7
Authoritarian regimes have one overarching goal: maintain power at any cost. President Trump this morning regarding the Senate filibuster: "Now, if we do what I'm saying, they'll most likely never obtain power." www.yahoo.com/news/article...
Trump Tells Republicans They’ll Never Lose Again if They Nuke Filibuster: ‘If We Do What I’m Saying’ Democrats Will ‘Most Likely Never Attain Power’
President Donald Trump amped up his push for GOP Senators to nuke the filibuster — vowing that, if they do so, Democrats will "likely never attain power."
www.yahoo.com
November 5, 2025 at 7:11 PM
Authoritarian regimes have one overarching goal: maintain power at any cost. President Trump this morning regarding the Senate filibuster: "Now, if we do what I'm saying, they'll most likely never obtain power." www.yahoo.com/news/article...
Thank you @apha.org for recognizing the work of past and present UCS experts who documented the equity & environmental justice impacts of the first Trump administration's anti-science actions. pubmed.ncbi.nlm.nih.gov/36737622/
November 5, 2025 at 6:56 PM
Thank you @apha.org for recognizing the work of past and present UCS experts who documented the equity & environmental justice impacts of the first Trump administration's anti-science actions. pubmed.ncbi.nlm.nih.gov/36737622/
"Our hope is that China’s nuclear weapons experts will tell President Xi the same thing we hope US experts will tell President Trump: that the costs of resuming explosive nuclear testing far outweigh any imagined benefits." Gregory Kulacki's latest: act.ucsusa.org/3LLlzoo
China Has the Most to Gain from New Nuclear Tests
President Trump announced the United States will resume nuclear testing, but if China follows suit, he may regret this decision.
act.ucsusa.org
November 5, 2025 at 4:03 PM
"Our hope is that China’s nuclear weapons experts will tell President Xi the same thing we hope US experts will tell President Trump: that the costs of resuming explosive nuclear testing far outweigh any imagined benefits." Gregory Kulacki's latest: act.ucsusa.org/3LLlzoo
We know President Trump is no friend of science or of providing health care to those who need it. The data and evidence show: acceptance and appropriate healthcare save kids’ lives. Get the facts: act.ucsusa.org/4qFhdQ1
President Trump Is Using Lies to Attack Trans Kids and Endanger Their Health: Here Are the Facts
Pretending kids don't know who they are isn't protecting them. Acknowledging and accepting kids as they are saves lives.
act.ucsusa.org
November 5, 2025 at 2:34 PM
We know President Trump is no friend of science or of providing health care to those who need it. The data and evidence show: acceptance and appropriate healthcare save kids’ lives. Get the facts: act.ucsusa.org/4qFhdQ1
Reposted by Union of Concerned Scientists
The Union of Concerned Scientists (@ucs.org) is leading the charge to "Call out the Harm! Sound The Alarm!" regarding the Trump administration's relentless and harmful attack on scientific research & knowledge.
Here is a starter pack of scientists sounding that alarm.
go.bsky.app/RMo1iWM
Here is a starter pack of scientists sounding that alarm.
go.bsky.app/RMo1iWM
October 31, 2025 at 6:19 PM
The Union of Concerned Scientists (@ucs.org) is leading the charge to "Call out the Harm! Sound The Alarm!" regarding the Trump administration's relentless and harmful attack on scientific research & knowledge.
Here is a starter pack of scientists sounding that alarm.
go.bsky.app/RMo1iWM
Here is a starter pack of scientists sounding that alarm.
go.bsky.app/RMo1iWM
New UNEP Emissions Gap Report finds that, without immediate aggressive action, the world could be on track for 2.3°C-2.8°C of global warming over the century. www.unep.org/resources/em...
Emissions Gap Report 2025
UNEP’s Emissions Gap Report 2025: Off Target finds that available new climate pledges under the Paris Agreement have only slightly lowered global temperature rise over the course of this century, leav...
www.unep.org
November 4, 2025 at 3:18 PM
New UNEP Emissions Gap Report finds that, without immediate aggressive action, the world could be on track for 2.3°C-2.8°C of global warming over the century. www.unep.org/resources/em...
UCS is working to build a powerful alliance for independent science. Read former Director of Policy Analysis for the Center on Science and Democracy's guest blog post and learn more about how to support the effort. act.ucsusa.org/4hHrBCo
UCS Is Building an Alliance for Independent Science
UCS is working to build a powerful alliance for independent science. Its new web resource hosts information and resources for current and former advisory committee members, current and former federal ...
act.ucsusa.org
November 4, 2025 at 2:50 PM
UCS is working to build a powerful alliance for independent science. Read former Director of Policy Analysis for the Center on Science and Democracy's guest blog post and learn more about how to support the effort. act.ucsusa.org/4hHrBCo
The trucking industry keeps our economy moving—but that doesn’t give it a free pass for its negative impacts. From pollution in frontline communities to heat-trapping emissions and damaged roads and bridges, this fossil-fueled sector must pay its fair share.
Trucks Cause the Lion’s Share of Road Damage—and Their Industry Wants You to Keep Paying for It
There is no reason for US taxpayers to foot the bill for a trillion-dollar per year industry.
blog.ucs.org
November 3, 2025 at 4:55 PM
The trucking industry keeps our economy moving—but that doesn’t give it a free pass for its negative impacts. From pollution in frontline communities to heat-trapping emissions and damaged roads and bridges, this fossil-fueled sector must pay its fair share.
1. Happy Election Hero Day! Election Hero Day is a nonpartisan, national celebration recognizing the tremendous contributions that election officials, their staff, and poll workers make to ensure a safe, secure voting experience for all Americans.
November 3, 2025 at 4:48 PM
1. Happy Election Hero Day! Election Hero Day is a nonpartisan, national celebration recognizing the tremendous contributions that election officials, their staff, and poll workers make to ensure a safe, secure voting experience for all Americans.