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Mark Sandeen

@marksandeen.bsky.social
113 followers 175 following 70 posts

Town of Lexington Select Board Member Former Chair, Sustainable Lexington

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Reposted by Mark Sandeen
Josh Lappen @jlappen1.bsky.social · 01/10/2026
In the year I've been working w/ air pollution regulators on data center on-site emissions, I've seen almost no acknowledgement of this trend from energy-side advocates of data center buildout. This isn't just bad actors-it's a corporate playbook and a roadmap to a future of unconstrained emissions.
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Prof Bill McGuire @profbillmcguire.bsky.social · 01/10/2026
“What we are seeing now is a complete explosion of these melt rates, leading to the disintegration of glaciers. They’re really just falling apart" Europe's glaciers are accelerating even faster on the road to oblivion www.theguardian.com/environment/...
theguardian.com
‘Explosion of melt rates’: 20% of Swiss glaciers lost in five years
Alpine regions in Europe experiencing extreme glacier collapse due to heat-trapping effects of fossil fuel pollution
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Ruth Delgado @heylookitsruth.bsky.social · 30/09/2026
“To the ICE agent who took away my mother: I hope it was worth it,” wrote Samuel Gonzalez Terrones before taking his own life. This is the reality of what mass deportation looks like. Not only impacting those who are detained but also leaving a path of destruction for the family they leave behind.
latimes.com
His mom was detained by ICE. Two months later, he died by suicide
Samuel Gonzalez Terrones, 21, struggled with depression and schizophrenia. His mom's arrest by ICE became too much to bear.
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Caleb Heeringa @calebheeringa.bsky.social · 29/09/2026
“We have to sit and listen as men worth unfathomable sums speculate about whether our species will survive their companies’ initial public offerings. We definitely weren’t designed to cope with all this.” 🎯
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Jan Rosenow @janrosenow.bsky.social · 27/09/2026
NEW BRIGHT SPOTS: "Just build more solar and batteries" I see this comment many times in my social media feed. The problem: The slogan undersells the problem. It also undersells the solution. The good news: we already have most of the tools we need. janrosenow.substack.com/p/the-proble...
janrosenow.substack.com
The problem with "just build solar and batteries"
Why the easiest story about the energy transition is misleading.
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David Ho @davidho.bsky.social · 22/08/2026
Many of us may want AI to go away but it’s going to bring the economy down with it when the bubble bursts.
nytimes.com
Opinion | A.I. Hype Is Running Into Reality (Gift Article)
And what a hedge fund’s $35 billion loss reveals about the state of the industry.
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Dave Vetter @davidrvetter.bsky.social · 21/11/2025
You ever just sit down and realize that the rise of 21st century fascism is capital's answer to climate change?
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alex䷰trismegistus @technihilism.bsky.social · 19/09/2026
"we asked a statistical model of the english language whether we should bomb a boat" what the fuck are we even doing here
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John Kostyack @kostyack.bsky.social · 15/09/2026
AI will kill us all (IF we let it). Not talking here about rogue AI agents, I'm talking about rogue tech oligarchs helping to torch the planet with major new investments in fossil fuel infrastructure.
bloomberg.com
US Data Centers Set to Burn More Natural Gas Than Most Nations
Data centers in the United States will consume more natural gas than most countries within a decade, according to a new outlook from BloombergNEF.
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Olúfẹ́mi O. Táíwò @olufemiotaiwo.bsky.social · 14/09/2026
"Pfas companies are launching a “tidal wave” of forever chemicals production to meet demand from the AI industry, a campaign organisation has warned...a survey of the 10 biggest manufacturers found most had plans to increase production." www.theguardian.com/environment/...
theguardian.com
‘Tidal wave’ of Pfas being launched to satisfy AI industry, campaigners warn
Big manufacturers planning to produce more of the forever chemicals to meet demand from datacentres
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Kees van der Leun @sustainable2050.bsky.social · 10/09/2026
Short sellers have reaped more than $2B in profits by shorting three small modular nuclear reactor companies—NuScale, Nano, and Oklo—over the past year, as the collapse of the one-time high-flying stocks wiped more than $30B off their combined market value - FT. seekingalpha.com/news/4634594...
seekingalpha.com
Short sellers have reaped billions in profits from betting against small modular reactor firms - FT
Short sellers have reaped more than $2B in profits by shorting three small modular nuclear reactor companies - NuScale Power, Nano Nuclear Energy and Oklo - over the past year, FT reported.
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Mark Vossler, MD (he/him) @markvmd.bsky.social · 08/09/2026
Today's reminder that climate change endangers our health. It doesn't endanger us equally. Folks with lower income, older folks, folks with pre-existing conditions are way more vulnerable to extreme heat. www.npr.org/2026/09/07/n...
npr.org
'Her body temperature was 106': How heat is killing Americans in their homes
Heat kills thousands of people across the U.S. every year. The risk is especially high for the millions of Americans who live in manufactured housing like mobile homes and trailers.
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Sustainable Farming @sustainablefarming.bsky.social · 04/09/2026
These Himalayan glaciers are collapsing extremely fast. So fast that the rock underneath them has become unstable and the ice holding the rock formations together is melting because the entire region is warming 5 times faster than the rest of the planet. Billions rely on steady meltwater for food.
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Mark Sandeen @marksandeen.bsky.social · 02/09/2026
jembendell.com/2026/08/28/a...
jembendell.com
A dozen disputed but now demonstrable facts about climate change from the consequential Deep Adaptation paper of 2018
In the months and years after the Deep Adaptation paper on climate change went viral with a million downloads, there was a backlash from top climatologists and environmental professionals. One of t…
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David Roberts @volts.wtf · 31/08/2026
Publicly owned rural co-ops are some of the most fossil-happy utilities in the US. Public ownership is no guarantee of pro-social behavior.
utilitydive.com
Electric co-ops press for repeal of gas power plant emissions rules
“We are anxious to see action on this,” said National Rural Electric Cooperative Association CEO Jim Matheson. “We all understand that natural gas is the go-to for new generation in this country.”
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Dr Charlie Gardner @charliejgardner.bsky.social · 21/10/2025
Here's something that's not talked about enough The air pollution from burning fossil fuels kills an estimated 10 million people a year 1 in 6 deaths is caused by fossil fuels www.sciencedirect.com/science/arti...
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Rep. Melanie Stansbury (NM-01) @repstansbury.bsky.social · 29/08/2026
Donald Trump is trying to give away part of Yosemite National Park to a private developer to develop a road near an ancient sequoia stand. Oh hell no! You better believe we will fight this with everything we’ve got!
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FRANCE 24 English @en.france24.com · 28/08/2026
🇳🇵 The devastating flooding in #Nepal and #Tibet has claimed more than 400 lives and left hundreds missing, with ongoing conditions complicating rescue efforts. Watch for a closer look at how the disaster unfolded ⤵️
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Aaron Huertas @aaronhuertas.bsky.social · 17/08/2026
Maybe I’m missing something but I’m not seeing any second-day reporting on the DSCC and DCCC suppressing a political scientists’s report about their shady email + text fundraising practices. I checked Google News and searched for related terms on here. Anybody else seeing anything?
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Leah Stokes @leahstokes.bsky.social · 17/08/2026
PSA: @adambonica.bsky.social is a badass. So impressed with his piece on spam PACs targeting seniors. The Democratic party needs to get on top of this. Follow and subscribe to his substack! data4democracy.substack.com/p/hook-and-s...
data4democracy.substack.com
Hook and Squeeze
How Democratic consultants, committees, and party leaders built a fundraising spam pipeline that funnels money from a captive pool of elderly donors into their own operations.
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Jeff Berardelli @weatherprof.bsky.social · 12/08/2026
‼️ Another 1000-YR Rain Event In fact, in some cases it exceeded the criteria by almost 2X. Catastrophic #Flood underway, Flood Emergency for #Indiana in Cambridge City, near New Castle, South of Muncie, east of #Indianapolis. Stay safe folks, turn around don’t drown! 1/
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Gravel Influencer @gravelinfluencer.bsky.social · 12/08/2026
I feared this would be one of the effects of the e-bike moral panic: Disabled people losing access to a gamechanging piece of transportation technology. This is a great reminder of how disabled nondrivers are often completely absent from conversations and policy debates about transportation.
Jesse’s Rides specializes in selling e-bikes, e-trikes and scooters for people with mobility or other issues that would preclude them from obtaining a car driver’s license. The law has hit this community hardest because many who can’t pedal rely on throttle-controlled Class 2 e-bikes, which have to be insured and require a license, she said.The woman who returned her new e-bike has a vision issue and fears that this would prevent her from getting an e-bike license under the new law, since she doesn’t have a driver’s license.

The law also unfairly affects people with medical issues who buy low-speed e-bikes with a throttle instead of a pedal-assist for use as transportation, Connor said.

“There are disabled people losing jobs or who can’t get to school because of this dumb bill,” she said.
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Dr. Jeff Masters @drjeffmasters.bsky.social · 12/08/2026
Smoke kills 24k Americans/yr. “The cost of climate-worsened wildfire smoke alone is larger than what earlier studies said every other estimated cost of climate change would be, combined. We should also worry about other surprise catastrophes that are lurking we’ll only learn about after they occur.
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Elizabeth Kolbert @elizkolbert.bsky.social · 12/08/2026
A simple point that surprisingly few people understand: "The longer we wait to reach net zero, the higher the eventual peak temperature will be, and the worse the associated damage. Warming is now nearly 1.4C above pre-industrial levels. Imagine summers when it gets closer to 2C."
giftarticle.ft.com
How to stop global warming
The answer is obvious to all except the real climate change zealots: the anti-net zero movement
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Dr. Aaron Thierry @thierryaaron.bsky.social · 10/08/2026
European summers aren't what they used to be! Grey curve is the climate of 1950-90. Every coloured line is a summer since 1991. Every one since 2005 sits beyond the 95th percentile of the curve. This isn't a shifting #climate. It's already a new one! 🤯🥵 Plot inspired by Barriopedro et al. 2011
Distribution of European summer temperature anomalies, June to August, over 25°W-40°E, 35-70°N, land only, the region used by Barriopedro et al., relative to 1961-1990, from ERA5. Grey bars show the 41 summers from 1950 to 1990, with a normal curve fitted through them, centred near zero. Coloured vertical lines show every summer from 1991 to 2025, shaded yellow through dark red by year, and almost all of them fall to the right of the grey distribution. The ten warmest are labelled, with 2024 furthest right at 2.74°C and 2022 next at 2.54°C. A dotted line marks the 95th percentile of the 1950-1990 distribution at 0.76°C.

Both run long, which is fine, since alt text has no practical limit and screen reader users benefit from the detail.
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Prof Ian Hall @ianhall.bsky.social · 08/08/2026
Exxon spent years telling everyone carbon capture could save the planet, while earning tens of $billions doing otherwise. The EU recently told it to help pay for carbon storage. In response, the world’s largest non-state-owned oil major has initiated a process to sue. www.ft.com/content/6afa...
ft.com
Exxon nears peak impunity on climate obligations
Oil major’s move against the EU’s carbon storage rules is odd
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advait @advaitarun.bsky.social · 08/08/2026
Almost a third of the U.S. population, maybe more, has tasted wildfire smoke this summer. The scale of our climate adaptation challenge is immense and I think it’s worth our time to make sense of what all we need to invest in—and how. Latest on the blog: advaitcore.substack.com/p/changes-in...
advaitcore.substack.com
Changes in the light
Notes on a capital theory of climate adaptation—and, tentatively, how to invest in a just transition for our quality of life.
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Jeff Berardelli @weatherprof.bsky.social · 07/08/2026
The Mediterranean Sea is hotter than the Gulf! At 91.4°F the Mediterranean just hit its highest water temperature ever measured 33.02°C! That’s hotter than anywhere in the US or Mexican #Gulf now, including off #Florida. 1/
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PM2.5 Kills ~9 Million People Each Year Worldwide @tkovach.bsky.social · 07/08/2026
PJM released its report on the large load loss event on 7/22. The grid lost 3,800 MW of load from data centers simultaneously, and it took 9 minutes to return to normal operations. The fault on the 230 kV line cleared normally, but data centers flipped to backup power. www.pjm.com/-/media/DotC...
• 07:56 Fault detected on a 230 kV line in Dominion
– Load transferred to back-up generation
– The load transfer caused high voltage conditions and triggered the transfer 
of additional load to back-up generation
– In total, approximately 3,800 MW of load transferred to back-up generation
– Fault cleared properly
§ There were no relay misoperations or stuck breakers
• 07:56 Reporting ACE reached +3,928
• 07:56 Frequency reached 60.092
• 08:06 BAAL excursion recovered within 9 minutes 
– BAL-001-2 R2 requires recovery within 30 minutesLine chart from PJM showing load (orange line) and Area Control Error (blue line) from 7:45-8:15am on July 22, 2026.

The load dropped from 99,984 MW at 7:55:39AM to 96,205 MW at 7:57AM for a max ACE of 3,928 MW
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Project Drawdown @projectdrawdown.bsky.social · 31/07/2026
🚨 Scientists have been warning for more than a century that catastrophic weather events were inevitable if humanity kept emitting GHG's. But is it worse than even they expected? Climate scientist @drkatemarvel.bsky.social shares her expert perspective in our latest Insights: bit.ly/4wsYPMw
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Abilu Tangwa. @abilutangwa.bsky.social · 02/08/2026
Every single second, the world hands $6,000 to the fossil fuel industry in subsidies. That’s $5 TRILLION every year. Renewables? Barely a fraction of that. We are literally paying to cook our own planet. When does this madness stop? 🌍💸 #ClimateCrisis #FossilFuels
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Bill McKibben @billmckibben.bsky.social · 01/08/2026
As the UN Secy General says, the Euro wildfires are just an opening act to the El Nino bearing down on planet earth. It's time for smart politicians to stop climate hushing and start getting ahead of the heat. open.substack.com/pub/billmcki...
open.substack.com
High Heat, High Drama
Europe is starting to provide some answers about the next step in the climate fight
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David Zipper @davidzipper.bsky.social · 31/07/2026
Which vehicles most endanger the drivers of other cars? Giant pickup trucks — and the Dodge Charger Source: www.iihs.org/news/detail/...
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Akshat Rathi @akshatrathi.bsky.social · 30/07/2026
"Four new reactors of 1 gigawatt each are now estimated to cost $14.4 billion -- 55% of more than the 2024 estimate." Even India can't stop spiraling costs of nuclear plant build out. www.bloomberg.com/news/article...
bloomberg.com
India’s Russian Nuclear Reactor Costs Surge 55% After Delays
The cost of adding four Russian-designed nuclear reactors at the Kudankulam plant in southern India has surged by more than half after the war in Ukraine pushed back construction by almost three years...
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Wolfgang Blau @wblau.bsky.social · 30/07/2026
The growing intermittency of…conventional nuclear energy. www.reuters.com/business/ene...
reuters.com
Low Danube river levels force Romania to shut down both of its nuclear power reactors
Romania will shut down its ‌second nuclear reactor on the Danube river, the energy ministry said on Wednesday, three days after decades-low river levels forced it to shut down the first.
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Dr. Jonathan Foley @globalecoguy.bsky.social · 29/07/2026
🤯🍔 Did you know that producing *one pound* of beef releases as much greenhouse gas pollution as burning 25-50 pounds of coal? And producing grass-fed beef is even worse? We gotta rethink our high levels of beef consumption...
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Project Drawdown @projectdrawdown.bsky.social · 29/07/2026
Red meat production accounts for 30% of global food-related emissions but generates only 5% of dietary calories or 2% of the global protein supply. That's why Project Drawdown researcher @enviroem.bsky.social calls it the coal of the food system: bit.ly/4x2yGnz
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Nahel Belgherze @wxnb.bsky.social · 20/07/2026
I've never seen anything like it. Salta, Argentina, has just recorded its hottest night on record during the climatologically coldest time of the year. The minimum overnight temperature did not fall below 26°C (78.8°F), pulverizing the previous monthly record by 7°C.
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Miriam Wasser @miriamwasser.bsky.social · 17/07/2026
At times, the wildfire smoke dampened New England solar production so much, it was akin to taking the region's largest nuclear power plant offline. @wbur.org #wildfiresmoke #energysky www.wbur.org/news/2026/07...
wbur.org
All that wildfire smoke sent New England's solar production plummetting
At peak hours, the solar fleet in the region produced 2,500 megawatts less than had been forecasted.
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Leah Stokes @leahstokes.bsky.social · 15/07/2026
Hard to describe the sorrow I feel watching the boreal forest burn, summer after summer. I was paddling on a lake yesterday when the smoke came in, and knew what was happening despite not having cell reception. Climate change is a heartbreaker.
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Jim Kane @kanejim.bsky.social · 08/07/2026
Wherein private equity closed-end funds discover something called physical risk.
bloomberg.com
Private Equity Turns to Heat Detectives as Climate Risks Intensify
For decades, investment models at the largest private equity funds relied on assumptions of relatively stable weather patterns. Now frequent extreme events are creating new threats for their portfolio...
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Bill McKibben @billmckibben.bsky.social · 08/07/2026
"Russian horse breeders are reporting a surge in sales because a steed is now cheaper to maintain than a car." billmckibben.substack.com/p/oil-as-ach...
billmckibben.substack.com
Oil as Achilles Heel
Lessons for leaders from the conflagration in Omsk
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Prison Policy Initiative @prisonpolicy.org · 04/07/2026
A grim reminder this 4th of July: The US has the highest incarceration rate of any independent democracy on Earth, making it a leader in mass incarceration. Far too many people are locked up in the “land of the free.”
Graph showing that the U.S. incarcerates people at a rate of 614 per 100,000. This is at least 4x higher than any other founding NATO countries.
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Ben Barclay @benbarclay.bsky.social · 03/07/2026
“Tight supplies and dwindling reserves on Thursday pushed market clearing prices briefly to nearly $28,000 per ​megawatt hour for idling power plants to come ⁠online,” That’s what happens when you have an ideologically driven agenda to not achieve Net Zero at all costs.
reuters.com
Grid operator PJM orders emergency steps to avoid large-scale US power outages
PJM, the largest U.S. power grid operator, said it ordered generators to run at maximum output and bring idle power plants online immediately on Thursday evening, as it faced escalating stress ​from a...
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Eoghan Daltun 🌍 @irishrainforest.bsky.social · 03/07/2026
The collapse of nature in our lifetimes has a sound – or rather a lack of it. Year on year, mesmeric natural soundscapes are ever more dumbed down, as this heart rending recreation of the dawn chorus over recent decades shows. www.theguardian.com/environment/...
theguardian.com
Listen to Britain’s dawn chorus of 1976: the dramatic loss of birdsong in 50 years
Guardian recreates audio landscape of past filled by loud morning symphony before 73m wild birds were lost
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Nahel Belgherze @wxnb.bsky.social · 03/07/2026
Satellite imagery shows how dramatically France's appearance has changed in just one month after two consecutive heatwaves, including the most intense ever recorded.
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Dr. Genevieve Guenther (she/they) @doctorvive.bsky.social · 02/07/2026
I was mocked when I included this IPCC finding in my book, but I do understand that it can seem unbelievable. So I’m sharing it again, in this heatwave, noting also that 3C heating is twice what we have now, and the impacts of global heating are non-linear. #EndFossilFuels
warming. According to the most recent IPCC report, 3 degrees Celsius of heating would mean that, for around three months of the year, the entire East Coast of the United States-from Maine to the Midwest and the Great Plains-and half of California would be exposed to "hyperthermic conditions that pose a risk of mortality." Southern California, the Southwest, the Deep South, and Florida would be this fatally hot nearly half the year.
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Matt Novak @paleofuture.bsky.social · 29/06/2026
Paris funeral homes overwhelmed after record heatwave
france24.com
Paris funeral homes overwhelmed after record heatwave
France on Monday counted its heat-related deaths, as a funeral business representative said Paris morgues have been overwhelmed by a spike in fatalities during a record-breaking heatwave.
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Nahel Belgherze @wxnb.bsky.social · 25/06/2026
Paris, the capital of France, has recorded more days above 40°C this week than during the 147-year period spanning from 1872 to 2019. Historic is an understatement.
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Leah Stokes @leahstokes.bsky.social · 25/06/2026
The heatwave in Europe is so extreme, it's 25–32°F (14–18°C) above normal. You read that right. France recorded it's hottest day ever. The UK had its hottest ever June day. The ground is exceeding 122°F (50°C). People are dying. Tell me again why we shouldn't talk about climate change???
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