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RadReduction (Larry Edwards)

@radreduction.bsky.social
524 followers 706 following 1.4K posts

Follow me on radical reductions of climate harming emissions (especially from flying, cruise). Engineer. Interests: climate, policy, overtourism. My location: Under the global cloud of GHGs. ResearchGate: www.researchgate.net/profile/Larry-…

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Reposted by RadReduction (Larry Edwards)
John Ryan @heyjohnryan.bsky.social · 30/09/2026
Good advice for journalists as well
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Reposted by RadReduction (Larry Edwards)
Greg Palast @gregpalast.bsky.social · 27/09/2026
In 2020, Ken Paxton stole Texas for Trump by blocking 2.5 million mail-in ballots in Harris County [Houston]. And he can do it again. The attack on mail-in ballots and drop boxes, unseen by the media, will determine the midterms nationwide. gregpalastinvestigates.substack.com/p/how-paxton...
gregpalastinvestigates.substack.com
How Paxton Will Steal Texas
The Senate candidate stole it for Trump, he can do it again.
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Reposted by RadReduction (Larry Edwards)
Portland Cruise Control_Maine @portcruisecontrol.bsky.social · 28/09/2026
Cozumel-Paradise Lost What happens when the cruise industry destroys the coral reefs? This documentary explores the growing environmental crisis on Cozumel, which once was one of the Caribbean’s most biologically rich marine ecosystems. "As long as you fight, there is always hope" Dr Mendez
youtube.com
Cozumel - Paradise Lost
YouTube video by Alexander Helff
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Reposted by RadReduction (Larry Edwards)
Al Czarnecki @alczarnecki.bsky.social · 27/09/2026
Wikipedia could use a cup of coffee – use and donations are down, and it is NOT FOR SALE – only 5% of users donate – this is a valuable resource, so please consider a one-time gift. wikipedia.org – always there for you #Wikipedia
wikipedia.org
Wikipedia, the free encyclopedia
Wikipedia is a free online encyclopedia, created and edited by volunteers around the world and hosted by the Wikimedia Foundation.
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Overshot the Carrying Capacity @overshot.bsky.social · 26/09/2026
bsky.app/profile/bill...
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Meade Krosby @meadekrosby.bsky.social · 26/09/2026
And carbon emissions from data centers are underestimated because in many cases they are illegally installing their own fossil fuel infrastructure. This isn’t even getting into the harms they cause neighboring communities.
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RadReduction (Larry Edwards) @radreduction.bsky.social · 26/09/2026
This is the result of either unjust federal law, or a poor delegation (by chance) of this three-judge appeals court panel. I hope there will be an appeal to the 9th Circuit for an "en banc" review by all the 9th Circuit judges. viewfromthewing.com/seattle-resi...
viewfromthewing.com
Seattle Residents Sue Delta And Alaska For Jets Polluting Their Homes—Case Gets Thrown Out
Residents near Sea-Tac sought cleanup, compensation, and medical monitoring over alleged aircraft pollution. Their claims failed because federal law bars separate state emissions standards—and they ha...
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Reposted by RadReduction (Larry Edwards)
Pacific Environment @pacenvironment.bsky.social · 25/09/2026
Why is Congress voting to scrap California’s clean air protections? 🚨 Learn why this is happening and what’s at stake for everyone — not just Californians — in a new op-ed for @thehill.com from Dori Chandler with the Coalition For Clean Air: thehill.com/opinion/ener... Takeaways below 🔽
thehill.com
Dirty tricks: Why is Congress voting to scrap California’s clean air protections?
This congressional overstep is creating an alarming precedent, threatening states’ authority to protect their residents from toxic pollution. The Senate must step in to stop it.
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Shoshanah in Alaska @shanahstone.bsky.social · 25/09/2026
It's never a choice between perfect candidates. Peltola and Sullivan are no exception @dermotcole.bsky.social
dermotcole.com
Reporting From Alaska- It's never a choice between perfect candidates.Peltola and Sullivan are no exception
I don’t care that Mary Peltola yells at her employees and sometimes says stupid things in the heat of the moment. Politicians say dumbass things all the time in private, though prudish press coverage ...
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Reposted by RadReduction (Larry Edwards)
Portland Cruise Control_Maine @portcruisecontrol.bsky.social · 23/09/2026
A floating city spewing pollutants into our neighborhoods. Is this our fate? More ships? Bigger ships No limits? Shouldn’t the goal be to protect Casco Bay & the air we breathe? If you are concerned please write: Council@portlandmaine.gov #MEpolitics #Portland #cruiseships #Maine
A detail of a cruise ship spewing exhaust from its funnel while it towers over neighboring rooftops.
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Reposted by RadReduction (Larry Edwards)
Stay Grounded @staygroundednet.bsky.social · 23/09/2026
What's worse than a private jet? Taking a private jet to buy your next super-yacht, that's what. One of Europe's largest yacht shows is taking place in Monaco - a gross display of excess and emissions. Activists from @all-eco-sociale.bsky.social greeted this year's super emitters at the airport.
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Reposted by RadReduction (Larry Edwards)
John Ryan @heyjohnryan.bsky.social · 22/09/2026
BTW today I saw this perfect sun halo near Seattle. Can never remember if that means: a) upper atmospheric ice crystals, or b) press freedom is under attack and all good people are being summoned to come to its defense
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John Ryan @heyjohnryan.bsky.social · 21/09/2026
"This ban could not be a more direct assault on the First Amendment nor a more blatant violation of our most fundamental constitutional principles."
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RadReduction (Larry Edwards) @radreduction.bsky.social · 21/09/2026
So true! Too, there is Royal Caribbean's latest monster ship that is under construction. Boastfully they call it the "Hero of the Seas". I call it the ship the "Nero of the Seas." It exemplifies a cruise industry and clientele that are fiddling (harmfully) while the planet burns.
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Portland Cruise Control_Maine @portcruisecontrol.bsky.social · 21/09/2026
Folly of the Seas by political cartoonist Tjeerd Royaards, an award-winning Dutch editorial cartoonist for the newspaper Trouw. H/T @cruiselaw.bsky.social Thank you for discovering Jim!
A cartoon drawing:

Folly of the Seas 
via @tjeerdroyaards, political cartoonist for Dutch newspaper Trouw.
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Portland Cruise Control_Maine @portcruisecontrol.bsky.social · 19/09/2026
Taking a look at the Vessel General Permit (VGP) for cruise ships & finding vast inconsistencies: docs.google.com/presentation... #violations #cruiseships #EPA
docs.google.com
PCC VGP share
This is a work in progress, inspired by this March 2026 article of cruise ship violations in Alaska and by the advocacy of Portland Cruise Control, Maine, to bring about a scrubber wash discharge ban by updating the city’s port tariff (like Seattle did.) Hopefully we can create movement also at t...
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Reposted by RadReduction (Larry Edwards)
Portland Cruise Control_Maine @portcruisecontrol.bsky.social · 19/09/2026
“The science is really clear that 10 knots or less is a speed limit that dramatically reduces both the chance of a large vessel hitting a whale, but also if it does happen to have an encounter with the whale, that it doesn’t kill it,” Freeman said.”
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Reposted by RadReduction (Larry Edwards)
Andrew Simms @andrewsimms.bsky.social · 15/09/2026
It’s not normal in a health & climate crisis to actively promote highly polluting products that make things worse. Congrats to Bristol - the latest city to end ads for things like fossil fuels, flights and SUVs. @badvertising.bsky.social @adfreecities.bsky.social www.bbc.co.uk/news/article...
bbc.co.uk
Bristol becomes first city to ban fast fashion adverts
New rules prohibits the promotion of flights, cars and travel agents on council-owned billboards.
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Center for Biological Diversity @biologicaldiversity.org · 18/09/2026
Another cruise ship has docked in Alaska with a dead endangered fin whale on its bow. 💔 Ships can kill these swimming giants in an instant as they hurtle through their habitat, and these collisions are one of the most frequent causes of premature death for several highly endangered marine mammals.
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Reposted by RadReduction (Larry Edwards)
marscello35.bsky.social @marscello35.bsky.social · 19/09/2026
Epstein is emerging from the Reflection Pool. He  is coated in yellow green algae and slime.
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RadReduction (Larry Edwards) @radreduction.bsky.social · 19/09/2026
"the episode underscores the profound risks of using this powerful, new and relatively poorly understood technology [AI} for targeting in the middle of a war. Analysts have long feared that AI could lead to a catastrophic miscalculation if nation states are relying on poor or corrupted data"
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Kevin Howley @khowley.bsky.social · 19/09/2026
Disqualified judicial appointee says what?
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RadReduction (Larry Edwards) @radreduction.bsky.social · 19/09/2026
ewwww! Crash and burn!
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John Ryan @heyjohnryan.bsky.social · 18/09/2026
Seattle-based cruise ship Norwegian Joy hits endangered fin whale in Alaska sitkasentinel.com/stories/fin-...
sitkasentinel.com
Fin Whale Struck by Cruise Ship in Sitka Sound - Daily Sitka Sentinel
A dead fin whale was pulled from the bulbous bow of the cruise ship Norwegian Joy this morning as the ship made its way toward the Sitka Sound Cruise Terminal for its port call in Sitka. The fin whale...
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Shoshanah in Alaska @shanahstone.bsky.social · 18/09/2026
Lisa Murkowski has thrown her full support behind Kyle Reardon who was unable to say Biden won the 2020 election and that J6 happened. He is nominated to the United States District Court for the District of Alaska.
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Reposted by RadReduction (Larry Edwards)
Jo Locktov @jolocktov.bsky.social · 18/09/2026
This ship is a weapon.
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Portland Cruise Control_Maine @portcruisecontrol.bsky.social · 18/09/2026
Shore power is used for usually less than 5% of the journey & who pays for it to be built? Not the cruise lines. Shore power is not the panacea they would like you to believe it is. Read the report from @seattlecruisecntrl.bsky.social seattlecruisecontrol.org/learn/greenh... #cruiseships
seattlecruisecontrol.org
Seattle Cruise Control | Climate
Seattle's cruise ships are detrimental to the environment and harms communities. Understand why.
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Reposted by RadReduction (Larry Edwards)
Stay Grounded @staygroundednet.bsky.social · 18/09/2026
Groups took action at 17+ European cities to #BanNightFlights at airports and expand #NightTrains, the best environmentally and socially just way to travel on the ground. Check out the summary of the actions: stay-grounded.org/night-trains... Sign the petition: actionnetwork.org/forms/ban-ni...
Night trains, not night planes
[with several photos from the actions]
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Reposted by RadReduction (Larry Edwards)
marscello35.bsky.social @marscello35.bsky.social · 18/09/2026
open.substack.com/pub/mitchthe...
open.substack.com
Mike Johnson Sent Congress Home for Seven Weeks. Try That at Your Job.
An impeachment vote, an AI crisis, a misconduct reform, and 700 of his own bills left sitting on the desk. Any other employee in America would be fired by lunch.
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Reposted by RadReduction (Larry Edwards)
Portland Cruise Control_Maine @portcruisecontrol.bsky.social · 18/09/2026
A dead endangered fin whale was pulled from the bulbous bow of the cruise ship Norwegian Joy this morning as the ship made its way toward the Sitka Sound Cruise Terminal for its port call in Sitka. @shanahstone.bsky.social @radreduction.bsky.social #cruiseships sitkasentinel.com/stories/fin-...
sitkasentinel.com
Fin Whale Struck by Cruise Ship in Sitka Sound - Daily Sitka Sentinel
A dead fin whale was pulled from the bulbous bow of the cruise ship Norwegian Joy this morning as the ship made its way toward the Sitka Sound Cruise Terminal for its port call in Sitka. The fin whale...
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RadReduction (Larry Edwards) @radreduction.bsky.social · 17/09/2026
The article complains about using "The" in front of DSA. That happens because it is an abbreviation, just for the same reason people refer to "the FBI." But "NASA" is different. That's an acronym, a pronounceable word. SOLUTION: Call it (phonetically) DeeSAw. That makes it a word. Pass it on!
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Reposted by RadReduction (Larry Edwards)
RadReduction (Larry Edwards) @radreduction.bsky.social · 15/09/2026
Here's a corporate false claim to an "ethos for small-scale, responsible travel". The company may be small-scale in business terms. But in our era of climate breakdown, Antarctic tourist travel is big-scale distance, unnecessary, and highly irresponsible . cruiseindustrynews.com/cruise-news/...
cruiseindustrynews.com
Lindblad Buys into 2 Air Travel Brands in its Largest-Ever Deal - Cruise Industry News | Cruise News
Lindblad Expeditions Holdings has acquired a majority ownership of White Desert, a luxury Antarctic company, and Echo Charlie, a new aviation travel brand providing specialized access to destinations ...
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Reposted by RadReduction (Larry Edwards)
Parents For Future #EndFossilFuels 🪧🛢️❌ @parentsforfuture.de · 15/09/2026
4σ event: 4 standard deviations above the historical mean 😬 1σ=common, 2σ=unusual, 3σ=genuinely rare, 4σ="wait,what?"
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Reposted by RadReduction (Larry Edwards)
Flight Free UK @flightfreeuk.bsky.social · 15/09/2026
📢Oxfordshire Residents📢 We are hosting our flagship event, ‘Travel, Flying and the Climate Crisis’ in Oxford next month. Our panel will discuss airport expansion, human influence on climate change and flight-free travel inspiration! Free tickets: tickettailor.com/events/fligh...
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Flight Free UK @flightfreeuk.bsky.social · 15/09/2026
Couldn't agree more. The crisis isn't coming, it's already here. Let's focus on what we can change: how we move, how we live, how we protect the planet.
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Portland Cruise Control_Maine @portcruisecontrol.bsky.social · 16/09/2026
Two floating cities in Portland today: Population: 5,367 The 2027 cruise season will have 26 days with 2 cruise ships in port: No regulations on scrubber wash discharge No long range strategy No cost-benefit analysis Is it time for a passenger cap? Asking for a friend. #cruiseships #Maine
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Clean Arctic Alliance @cleanarctic.bsky.social · 16/09/2026
How the Shipping Sector Must Respond to the @unep.org Overshoot Report cleanarctic.org/2026/09/16/h...
cleanarctic.org
How the Shipping Sector Must Respond to the UNEP Overshoot Report
London, September 16, 2026: – Responding to the publication of the UN Environment Programme report Limiting Overshoot: Navigating exceedance of 1.5°C and pathways towards return, which finds that as “...
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Kevin Anderson @kevinclimate.bsky.social · 16/09/2026
The CCC @thecccuk.bsky.social offers Heathrow a thumbs up, conditional on the massive deployment of “snake oil” technologies (SAF & GGR). Report by Tyndall researchers, building on UK Govt commitments, science & maths, reaches a very different conclusion. See: climateuncensored.com/heathrow-exp...
climateuncensored.com
Heathrow Expansion: The Physics Does Not Negotiate - Climate Uncensored
Below is the foreword I wrote for my Tyndall colleagues’ detailed and rigorous report examining whether further expansion of Heathrow can be reconciled with
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Shannon Kelly Donahue @shannonkellydonahue.com · 15/09/2026
C’mon, JKT. Do better. Go left. Represent the people who advanced you to the general election.
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RadReduction (Larry Edwards) @radreduction.bsky.social · 15/09/2026
About "63% of the studied species groups exhibited [Vapor Pressure Deficit] thresholds… the proportion of sites exceeding these thresholds has increased rapidly since about 1970 and is projected to rise further under" due to climate heating. Open access: www.pnas.org/doi/10.1073/...
Abstract:  "With global warming, rising atmospheric vapor pressure deficit (VPD) has emerged as a critical driver of vegetation productivity and the terrestrial carbon sink. Yet, the thresholds beyond which VPD constrains tree growth remain poorly quantified. Using 2,953 tree-ring sites and combining generalized additive models with threshold regression models, we demonstrate that growth-related VPD thresholds are widespread. Approximately 63% of the studied species groups exhibited identifiable thresholds, which were generally lower in cool, humid regions and higher in warm, dry environments. For the same tree species occurring under contrasting aridity conditions, thresholds also differed substantially. As VPD has risen, the proportion of sites exceeding these thresholds has increased rapidly since about 1970 and is projected to rise further under different emissions scenarios. Under SSP5-8.5 in particular, approximately 79.8% of the sites are projected to be exposed to VPD above their thresholds by the end of the century. Although potential upward threshold shifts associated with acclimation or adaptation could partly reduce future exceedance, this buffering effect becomes increasingly limited under stronger climate forcing. Without effective climate mitigation, rising VPD will increasingly exceed the tolerance thresholds of trees, placing more trees under sustained growth constraints and undermining terrestrial carbon sequestration."

"Significance:  Rising atmospheric vapor pressure deficit (VPD), a measure of atmospheric dryness, is increasingly recognized as a major threat to terrestrial ecosystems. Using global tree-ring records, we quantify growth-related VPD thresholds beyond which VPD-driven growth benefits weaken or VPD becomes inhibitory. As VPD continues to rise, more tree-ring sites are projected to exceed these thresholds. Although potential acclimation or adaptation may partly reduce this exposure, this buffering effect diminishes under stronger cli…
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RadReduction (Larry Edwards) @radreduction.bsky.social · 15/09/2026
University of Washington.
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Shoshanah in Alaska @shanahstone.bsky.social · 14/09/2026
If Dan Sullivan is effective why hasn’t anyone else sponsored his bill, not even Lisa Murkowski? 🤷🏻‍♀️ “(Sullivan’s Bycatch Reduction Act, filed in June, is scheduled for a vote in the Commerce Committee on Wednesday. He is the sole sponsor.)” #akelect
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RadReduction (Larry Edwards) @radreduction.bsky.social · 15/09/2026
Here's a corporate false claim to an "ethos for small-scale, responsible travel". The company may be small-scale in business terms. But in our era of climate breakdown, Antarctic tourist travel is big-scale distance, unnecessary, and highly irresponsible . cruiseindustrynews.com/cruise-news/...
cruiseindustrynews.com
Lindblad Buys into 2 Air Travel Brands in its Largest-Ever Deal - Cruise Industry News | Cruise News
Lindblad Expeditions Holdings has acquired a majority ownership of White Desert, a luxury Antarctic company, and Echo Charlie, a new aviation travel brand providing specialized access to destinations ...
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Portland Cruise Control_Maine @portcruisecontrol.bsky.social · 14/09/2026
“The Cruise Lines International Association says when it comes to Maine, it is committed to responsible tourism & managed growth." Is CLIA deciding "responsible tourism" & "managed growth" for Portland? Today’s floating city Population 5,620 app.publicnewsservice.org/story/portla... #cruiseships
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Stay Grounded @staygroundednet.bsky.social · 13/09/2026
We need night trains, not night planes! 🌜 ✍ Do you agree? Add you name to the petition: actionnetwork.org/forms/ban-ni... People are gathering today for this cause in more than 15 countries - join the one closest to you! 📍 #BanNightFlights #NightTrains #RedLinesForAirports
Night trains not night planes

Find the closest spot and join one of the protests!    København20:30 CEST
    Wien19:00 CEST
    Lille15:30 CESTairport → Gare de Flandres, by bike
    Paris16:30 CESTGare de l'Est
    Paris CDGSun 14 Sep, 17:30Roissy airport
    Liège18:30–19:30 CESTfreight airport
    Castricum13:30 CESTnight-flights symposium
    Montpellier18:00 CESTairport
    Berlin20:00 CESTHauptbahnhof, track 4
    Stockholm17:00 CESTCentral Station, main hall
    Amsterdam Centraal20:30 CEST
    Praha18:00 CEST
    Helsinki19:00 CESTCentral railway station
    Budapest
    Nice
    Luxembourg
    Southampton
    Tomar
    Gatwick
    Strasbourg

Beyond Europe
    Lubero · DR Congo
    Muhanga · Rwanda
    Kigali · Rwanda
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Patrick Canning 🇨🇦 @patrickcanning.bsky.social · 12/09/2026
The looting of Venezuela is not limited to oil
bloomberg.com
Mercuria and Glencore Said to Vie for Venezuela Aluminum Deal
Mercuria Energy Group Ltd. and Glencore Plc are among firms interested in a deal for Venezuela’s largest aluminum smelter, in what would mark a significant push by top commodity traders into the count...
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Prof Bill McGuire @profbillmcguire.bsky.social · 12/09/2026
Crook gives a bunch of crooks a load of cash www.theguardian.com/politics/202...
theguardian.com
Reform UK given record £36m donation by British crypto billionaire
Ben Delo was convicted in US for failing to implement adequate anti-money laundering controls but pardoned by Trump
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John Ryan @heyjohnryan.bsky.social · 12/09/2026
“Peatlands cover just 3-4% of the Earth's land surface but store roughly 30% – an estimated 450-650 gigatonnes – of global soil organic carbon, and almost twice the carbon stock of the world’s entire forest biomass.”—UN FAO h/t @queenofpeat.bsky.social www.fao.org/forestry/new...
King!s scepter gentian at Cape Scott, B.C.
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RadReduction (Larry Edwards) @radreduction.bsky.social · 12/09/2026
"Meanwhile, polling continues to show that most Albertans remain opposed to separation. ...support for leaving Canada has generally remained well below a majority. "That reality may explain why the economic details have been so politically inconvenient."
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RadReduction (Larry Edwards) @radreduction.bsky.social · 12/09/2026
That isn't the only looming Southern Ocean problem. This one can lead to a feedback reducing a carbon sink. At about 430 ppm CO2 now, we are almost there. McNeil & Matear (2008), open access www.pnas.org/doi/10.1073/...
Southern Ocean acidification: A tipping point at 450-ppm atmospheric CO2

Ben I. McNeil (b.mcneil@unsw.edu.au) and Richard J. Matear - Authors

December 2, 2008

Proceedings of the National Academy of Sciences (PNAS) 105 (48) 18860-18864 https://doi.org/10.1073/pnas.0806318105

Abstract

Southern Ocean acidification via anthropogenic CO2 uptake is expected to be detrimental to multiple calcifying plankton species by lowering the concentration of carbonate ion (CO32-) to levels where calcium carbonate (both aragonite and calcite) shells begin to dissolve. Natural seasonal variations in carbonate ion concentrations could either hasten or dampen the future onset of this undersaturation of calcium carbonate. We present a large-scale Southern Ocean observational analysis that examines the seasonal magnitude and variability of CO32- and pH. Our analysis shows an intense wintertime minimum in CO32- south of the Antarctic Polar Front and when combined with anthropogenic CO2 uptake is likely to induce aragonite undersaturation when atmospheric CO2 levels reach ˜450 ppm. Under the IPCC IS92a scenario, Southern Ocean wintertime aragonite undersaturation is projected to occur by the year 2030 and no later than 2038. Some prominent calcifying plankton, in particular the Pteropod species Limacina helicina, have important veliger larval development during winter and will have to experience detrimental carbonate conditions much earlier than previously thought, with possible deleterious flow-on impacts for the wider Southern Ocean marine ecosystem. Our results highlight the critical importance of understanding seasonal carbon dynamics within all calcifying marine ecosystems such as continental shelves and coral reefs, because natural variability may potentially hasten the onset of future ocean acidification.
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