Water Vapour is more powerful as a greenhouse gas than CO₂ and there is a lot more of it. So why is it not to blame for global warming? The answer is its an amplifier, not a baseline forcing. drtomharris.substack.com/p/why-do-we-... #climatechange #watervapour #hydrology #watercycle #feedback

Global CO₂ emissions rose by +0.7% in 2025, but clean electricity avoided a massive 10.3 Gt, driving power-sector emissions down by 0.9% We’re making progress, just not fast enough… At this pace, the 1.5°C carbon budget will be gone by 2029, so, yes, action is urgent www.nature.com/articles/s43...

As we pump more CO2 into the atmosphere our food supply becomes more impoverished. This Nutrient Dilution is a global problem for every organism that eats plants, or eats things that eats plants. IOW pretty much all life on Earth. bsky.app/profile/mike... s2.washingtonpost.com/4741705/69f3...

It's hard being a climate comedian's therapist... 🫠

Batteries are key. Store renewable energy for when its needed and job done. If a 10th of the money being used to subsidise FF were used for battery research we'd be there in a year.

Current economic theory and policy is catastrophically underestimating future climate damages. New reports show that far from continued indefinite GDP growth, within decades 50% of GDP could be destroyed. drtomharris.substack.com/p/climate-ri... #climatechange #economy #climatedamages #risk

Presumably their profits also grew due to the US administration giving them a few billion NOT to build wind farms?

The coming El Niño could permanently alter the climate, scientists warn. via @insideclimatenews.org

But reality is worse...e.g. AMOC

Critical social scientists - our voices matter. Unfortunately there is a burden on us to develop thick skin to deal with comments about 'fluffy' science or questions about the point of our research. Don't hesitate to acknowledge that there may not be comfortable solutions (eg to climate change) 1/2

📣Out now! We are pleased to release the European State of the Climate 2025 report, published jointly by #CopernicusClimate @ecmwf.int & @wmo-global.bsky.social#CopernicusClimate Explore climate conditions, key events of 2025 in Europe, long-term climate indicators, climate policy and action for biodiversity, more! ⬇️

The evidence doesn't support any ruminant production from an environmental/PB perspective

Some people continue to advocate for regenerative grazing as a big climate solution. But it's not. The better answer is to cut back on beef consumption, curb food waste, and rethink the food system. drawdown.org/insights/gre...

The rest of the world is moving on while the US goes backwards. Where are the checks and balances on the madness that comes out of there on a daily/hourly basis?

1. Every year, large areas of gorse in Dartmoor and Exmoor national parks are deliberately burnt. It’s an appalling act of vandalism, killing wildlife, preventing regeneration of crucial habitats, releasing toxic smoke and carbon. This thread is about why it’s happening. Pic from this weekend. 1/7

The climate and ozone crises are not the same, but their parallels offer several points of clear strategic guidance for fossil phaseouts, based on how Montreal Protocol architects surmounted specific challenges. Read Ted Parson on the lessons for Santa Marta: legal-planet.org/2026/04/27/f...

The Montreal Protocol is periodically proposed as a model for climate change but often dismissed, as an allegedly easy issue not relevant to the harder problem of GHGs – based on claims that alternatives to the chemicals were known before the key decisions to restrict them. This account is wrong.

A reminder of where we stand. Source: ed-hawkins.github.io/climate-visu...

I shared an analysis recently that suggests we're going to breach 2C much before 2050.

Should probably make this a permanent pinned post for reality check purposes. Assuming we reach 1.7C by 2050 (we are currently at 1.4C), we would need carbon dioxide removal of 400GtCO2 to get back to 1.5C. For context, the world currently emits 40GtCO2 annually. drilled.media/news/cop30-g...

100% ...

Finally, there's climate change. While people focus on beef, keep in mind that even the lowest-carbon meat -- chicken -- emits 3x as much as plant-based meat, and 6x as much as beans and lentils.

"This Is What Climate Change Looks Like Right Now" | My interview earlier today with the great @thomhartmann.skystack.xyz: www.youtube.com/watch?v=YXVW...

Also in worksite cafeterias: Increasing the availability of vegetarian meals can significantly shift food choices and reduce environment impact and calories consumed, without compromising business outcomes: doi.org/10.1186/s129... #Vegetarian #Canteens #Catering #FoodServices #Sustainability #Health

"Just as we make ourselves more energy-secure by switching from fossil fuels to renewables, we make ourselves more food-secure by switching from animals to plants." - @georgemonbiot.bsky.social

As @billmckibben.bsky.social says, we urgently need to stop burning things for energy. This includes burning fossil fuels of course, but also burning trees and crops, which *increases* emissions for decades. We need to electrify energy systems using solar and wind.

Breaking: New study using observational constraints projects that the Atlantic Ocean circulation #AMOC will weaken ~50% by 2100, even for medium emissions and without Greenland melting. 🌊 More realistic models means stronger weakening - not entirely unexpected. www.science.org/doi/10.1126/...

and "CO2 is good for the planet" www.canarymedia.com/articles/enn...

Glaciers had one of their worst years in 2025: 👉 408 billion tonnes of ice mass lost 👉 ≈1.1 mm added to global sea levels 👉 6 of the 7 worst years have happened in the past 7 yrs Since 1975: ~9,600 billion tonnes gone (≈26.4 mm SLR) This isn’t a gradual change... www.nature.com/articles/s43...

Putting the hot & dry summer of 1976 into context 50 years after the extreme summer for the UK and Ireland, what can we still learn? climatelabbook.substack.com/p/the-summer...

Chinese carmaker BYD unveils a recharge as fast as filling up with petrol. And no need to wear gloves. Certainly not coming to a forecourt near you in America because the fossil fuel giants and their puppets in government like making lots and lots of cool money from easily-conned petrolheads.

The Global Systems Institute is excited to be involved in the Exeter Climate Forum this summer, bringing together global leaders in climate science, policy and business. If you’re interested in the latest climate insights and solutions, join us: exeterclimateforum.com #ECF2026 #ExeterClimateForum

To state the blatantly obvious: attacking federal researchers does 👏🏻 not 👏🏻 eliminate 👏🏻 the critical issues being studied. Climate change, health crises, & extreme weather affect ALL of us. If you are a scientist being targeted for your work, reach out for a free, confidential 1:1. csldf.org/contact

This study supports " The Dawn of Everything" hypothesis ( @davidwengrow.bsky.social ) that hunter-gatherers lasted much longer than previously thought. Also supports the concept in"Sapiens" (Yuval Noah Harari) that the switch to agriculture could be considered a significant downgrade.

Global warming is a slowly meandering ghost

This piece is kicking up some dust. More and more upwardly mobile people who've trusted suburban homeownership and rising incomes to secure their future are now finding their lives getting brittle as the climate crisis worsens. alexsteffen.substack.com/p/resilient-...

In-depth - but very readable account on how heating our 🌎 could lead to tipping points in Atlantic currents, with big implications for Europe. Huge uncertainty - but we are running the experiment now, so young people may well find out. t.co/gMu6Zw5mR7

BBC world service 👍...

This kind of rainfall in GN should be headline news (even though it happens in GS) and yet...? We may need this to fall on a GN capital for it to be registered.

Excellent explainer thread 👏👏👏

If I ever do want lessons on what the public interest looks like I'm pretty sure I won't take them from a thin skinned, self interested, tax avoiding, Brexit supporting, billionaire.

Global Sea Surface Temperatures in the @ecmwf.int ERA5 dataset have reached 21°C❗️ These temperatures are likely without precedent for hundreds of thousands of years, until recently.. See below. 1/ (The ERA5 Sea Surface Temperatures referer to 10 m depth, while @noaa.gov uses "skin" temperature)

How cultural history becomes climate history...

The Nino index (Nino3.4) has just reached neutral, but global SST has matched the highest level for this date, which was achieved during the last El Nino. Super warming is clear. U of Maine Climate Change Institute has a spectacular interactive graphic that they update daily. tinyurl.com/2kj82pwa

New projections of British biodiversity under plausible climate & land-use futures Severe futures have 12-20% birds, butterflies, plants going extinct & major changes to ecosystems More sustainable scenarios only decrease & do not stop loss; but require urgent action www.nature.com/articles/s41...

I don't disagree that CO2 emissions have to be zeroed. I'm saying that methane does too, or we'll cross 1.5C and then 2C thresholds. I agree that the duration & magnitude of overshoot matters, but we don't know how close we are to warming thresholds for GIS/WAIS collapse, AMOC shutdown, etc.

Can't say I completely agree with you here, Mike. If CO2 continues to be emitted, we'll cross those critical warming thresholds anyway, just a bit later -- and any tipping points (however ill-defined) are far more likely to be triggered by the persistent warming due to CO2 than by a temporary

Reducing CO2 emissions is paramount. But reducing methane is necessary for avoiding critical warming thresholds. Warning we could soon cross these limits while downplaying the importance of methane reductions is hypocritical.

They're a game changer. The more you can store and the longer you can store it, the more reliable it is and that will change everything.

I'm sure that's true. But I can't believe that 100% of the land used for raising animals for food can only be used for that purpose, instead of crops for human consumption or forests or biodiverse grasslands. And it would only take a tiny proportion of the beef/lamb land to feed us entirely.