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Stephen Cornelius

@climatesteve.bsky.social
633 followers 142 following 39 posts

Deputy Global Leader - Climate and Energy at WWF #ClimateChange I was @SteveJCornelius on X

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Stephen Cornelius @climatesteve.bsky.social · 19/03/2026
Thanks to @carbonbrief.org for hosting the 11th and every challenging #CBquiz. #WWF team Bamboo-zeled had a great time and are proud of our 8th place out of 39 teams. Going to swot up on European environment ministers names for next year!
Selfie of the WWF quiz team looking with a few dozen players from other teams in the background at Octopus Energy HQ in London
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Stephen Cornelius @climatesteve.bsky.social · 26/11/2025
The #COP30 wrap-up report from @iisd.org's excellent Earth Negotiations Bulletin. This (and Carbon Brief's summary) are what you need to read! enb.iisd.org/belem-un-cli... #ClimateChange
enb.iisd.org
Summary report 10–21 November 2025
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Stephen Cornelius @climatesteve.bsky.social · 22/11/2025
Woke up for last morning in Belem to see where Ministers got up to overnight at #COP30... but then the #ashes test cricket
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Stephen Cornelius @climatesteve.bsky.social · 21/11/2025
Much improvement is needed in #COP30 draft. The roadmaps for transitioning away from fossil fuels and using deforestation are missing. A long day ahead for ministers and negotiators. wwf.panda.org/wwf_news/pre... #ClimateChange
wwf.panda.org
Latest drafts of COP30 texts “extremely disappointing”
WWF dismayed at failure to include roadmaps to transition away from fossil fuels and stop deforestation
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IPBES @ipbes.net · 17/11/2025
🌍 Did you know? Biodiversity loss, climate change, health, water & food security are linked! IPBES #NexusAssessment explores 70+ solutions for a sustainable future.🏡🧪 Discover how interconnected challenges need interconnected actions with UNEP-WCMC ow.ly/BXLH50Xpb9C
ow.ly
70 responses to biodiversity loss: the IPBES Nexus Assessment - UNEP-WCMC
A landmark new report was launched today by the Intergovernmental Platform on Biodiversity and Ecosystem Services (IPBES). The Assessment Report on the Interlinkages Among Biodiversity, Water, Food and Health – known as the Nexus Report - offers decision-makers around the world the most comprehensiv…
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Stephen Cornelius @climatesteve.bsky.social · 15/11/2025
Proud to be part of the People’s #Climate March with friends from WWF and tens of thousands of others in social movements and communities committed to building a fairer and more sustainable future #COP30
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Stephen Cornelius @climatesteve.bsky.social · 13/11/2025
Insidious misinformation and disinformation around #ClimateChange sow confusion and delay #ClimateAction. This is an important development. See also Cranky Uncle to understand how science denial works... app.crankyuncle.info/home #COP30
app.crankyuncle.info
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Climate Action Tracker @climateactiontracker.org · 13/11/2025
CAT Global Update 2025 🚨 Ten years after the #ParisAgreement we see little to no measurable progress in warming projections - for the fourth consecutive year. The 2035 #NDCs have made no difference to our warming outlook. 🔗 bit.ly/CAT_Global_2...
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Stephen Cornelius @climatesteve.bsky.social · 10/11/2025
As #COP30 kicks off in Belém’s heat and downpours, the world must #CloseTheGap on climate action - more mitigation, adaptation and finance We also need a Nature Package to safeguard forests and biodiversity - because the Amazon COP should deliver for people and planet. #ClimateAction
In Belém - a little lizard on an big old rope in foreground with river and boat/jetty in backgroundIn Belém - a large black ant on a tropical fruit surrounded by green leaves
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Stephen Cornelius @climatesteve.bsky.social · 28/08/2025
This is worth a read - factchecking claims (myths) about solar power #ClimateChange
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🌍⚖️ Sébastien Duyck @duycks.bsky.social · 23/07/2025
🔥 ⚖️ 🌐HAPPENING NOW: Historic #ClimateJustice Ruling being delivered by the 🇺🇳 🧑‍⚖️ International Court of Justice. 🚨This ruling could signal a new dawn for climate law & accountability 📝 🧵 Live thread below with context, summary & analysis 👇 #ClimateJusticeAO #AOLetsGo
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Stephen Cornelius @climatesteve.bsky.social · 25/06/2025
A good start to the Climate Innovation Forum as part of #LondonClimateActionWeek including telling people that #ClimateAction is happening #LCAW25 #CIF25 #ClimateChange
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Stephen Cornelius @climatesteve.bsky.social · 24/06/2025
I'm looking forward to meeting people at #LondonClimateActionWeek Before then, read this op-ed by the mayors of London and Paris on disinformation and misinformation and the backlash to #ClimateAction www.theguardian.com/commentisfre... #ClimateChange
theguardian.com
In London and Paris, we’ve experienced vicious backlash to climate action. But we’re not backing down | Sadiq Khan and Anne Hidalgo
Around the world, well-funded, organised climate deniers are spreading lies about the crisis. We call on governments and tech companies to step up, say London mayor Sadiq Khan and Paris mayor Anne Hid...
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Ed Hawkins @edhawkins.org · 29/05/2025
The village of Blatten in Switzerland is partly buried by the collapse of a glacier which melted because our greenhouse gas emissions warmed the climate. Another reminder that choosing to not invest enough today to reduce emissions means far greater costs for society in the long term.
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Stephen Cornelius @climatesteve.bsky.social · 23/05/2025
Weatherwatch: The Met Office fights back against climate misinformation The most impressive part of the Office’s misinformation ‘toolkit’ is its set of answers to climate deniers’ questions www.theguardian.com/news/2025/ma... #ClimateChange ‪@metoffice.bsky.social‬
theguardian.com
Weatherwatch: The Met Office fights back against climate misinformation
The most impressive part of the Office’s misinformation ‘toolkit’ is its set of answers to climate deniers’ questions
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Parents for Climate @parentsforclimate.bsky.social · 19/05/2025
Here it is, finally. The truth. In a landmark #greenwashing legal case brought by @parentsforclimate.bsky.social, #EnergyAustralia has publicly acknowledged that offsets do not undo the harms of burning fossil fuels & apologised to more than 400,000 customers of its carbon #offsetting product
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Stephen Cornelius @climatesteve.bsky.social · 16/05/2025
Some amazing nature photos here (and some awfully sad ones in the 'Humanity vs Nature' category) www.theguardian.com/artanddesign...
theguardian.com
A seadragon and flushing worms: Environmental Photography award winners – in pictures
Winning images from the 2025 of Prince Albert II of Monaco Foundation Environmental Photography award, selected from 10,000 images submitted globally
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Carbon Brief @carbonbrief.org · 15/05/2025
NEW – Analysis: Clean energy just put China’s CO2 emissions into reverse for first time | @laurimyllyvirta.bsky.social Read here: buff.ly/6eAcjRU
Line chart – China's CO2 emissions are now 1% below their March 2024 peak: China’s emissions from fossil fuels and cement, million tonnes of CO2, rolling 12-month totals. Source: Emissions are estimated from National Bureau of Statistics data on production of different fuels and cement, China Customs data on imports and exports and WIND Information data on changes in inventories, applying emissions factors from China’s latest national greenhouse gas emissions inventory and annual emissions factors per tonne of cement production until 2024. Sector breakdown of coal consumption is estimated using coal consumption data from WIND Information and electricity data from the National Energy Administration.
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Doug Parr @dougparr.bsky.social · 14/05/2025
Unexpected - EU companies increasingly aligned with climate action “Those vocally organising to oppose the energy transition achieve outsized importance across public debate. However, there is a larger, quieter majority that are supportive of decarbonisation” www.theguardian.com/environment/...
theguardian.com
European firms ramping up lobbying for climate action, report finds
Research shows companies ‘aligned’ with strategies to meet climate goals have risen from 3% in 2019 to 23% in 2025
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Jan Rosenow @janrosenow.bsky.social · 12/05/2025
Solar energy has consistently been underestimated. Today, it adds more capacity/yr to global grid than any other source in history. If trend continues, solar will deliver more electricity generation/yr than any technology before it. Graph from @nathanielbullard.com - great newsletter
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Sam Burgess @oceanterra.org · 06/05/2025
How are #heatwaves changing in #Europe? According to the European #Climate Report, 2024 saw: 🌡️ Record-breaking ‘strong heat stress’ days and tropical nights in southeastern Europe during summer 🥵 In recent decades, heat has been the leading cause of reported deaths due to extreme weather 🌍🧪⚒️🌡️🌊
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Leo Hickman @leohickman.carbonbrief.org · 21/04/2025
Pope Francis last year on those who deny climate science: "There are people who are foolish, and even foolish if they show you them research. They don't believe it…They don't understand the situation or because of their interest, but climate change exists." www.dailymail.co.uk/news/article...
dailymail.co.uk
Pope Francis uses first US TV interview to slam climate change deniers
Pope Francis spoke out against climate change deniers, calling them 'fools' in his first ever interview on American television.
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Stephen Cornelius @climatesteve.bsky.social · 14/04/2025
Power-sector CO2 hits ‘all-time high’ in 2024 despite record growth for clean energy www.carbonbrief.org/power-sector... “Solar power has become the engine of the global energy transition..." @carbonbrief.org
Bar chart "Solar added more than twice as much generation in 2024 as any other source"  Carbon Brief graphic using Ember data
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Prof. Stefan Rahmstorf @rahmstorf.bsky.social · 23/03/2025
The 2024 state of the climate report: a report by leading international scientists on recent trends in planetary vital signs. (Ignore at your peril.) academic.oup.com/bioscience/a...
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Seth Abramson @sethabramson.bsky.social · 10/03/2025
In a world of Matts, be a Derek.
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Stephen Cornelius @climatesteve.bsky.social · 05/03/2025
Half of world’s CO2 emissions come from 36 fossil fuel firms Coal, oil and gas are the biggest driver of #ClimateChange www.theguardian.com/environment/...
theguardian.com
Half of world’s CO2 emissions come from 36 fossil fuel firms, study shows
Researchers say data strengthens case for holding firms to account for their contribution to climate crisis
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Valérie Masson-Delmotte @valmasdel.bsky.social · 25/02/2025
I receive numerous requests from journalists regarding the current situation with the Intergovernemental Panel on Climate Change. I am not involved in the work of the IPCC for the 7th Assessment Cycle (AR7). 1/...
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Prof Michael Meredith 🌊🧪🥼❄️ @oceanandice.bsky.social · 20/02/2025
Climate change will increasingly impact the ocean around Antarctica, and the life within it, as it progresses. Read the new paper by the excellent Ben Fisher and colleagues on how this will happen, what are the implications, and how we can improve our ability to predict the key changes. 🌊❄️🥼🧪
bg.copernicus.org
Climate-driven shifts in Southern Ocean primary producers and biogeochemistry in CMIP6 models
Abstract. As a net source of nutrients fuelling global primary production, changes in Southern Ocean productivity are expected to influence biological carbon storage across the global ocean. Following...
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Stephen Cornelius @climatesteve.bsky.social · 14/02/2025
Happy Valentine's Day chocolate lovers... “excessive heat can contribute to a reduction in the quantity and quality of the harvest” Need to cut emissions and adapt #ClimateChange www.theguardian.com/environment/...
theguardian.com
Climate crisis contributing to chocolate market meltdown, research finds
Scientists say more-frequent hotter temperatures in west African region are part of reason for reduced harvests and price rises
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Andrew Dessler @andrewdessler.com · 12/02/2025
My latest on The Climate Brink: No, renewables don't need expensive backup. In fact, renewables push the most expensive fossil fuel producers out of the market, saving money for the economy. www.theclimatebrink....
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Simon Evans @drsimevans.carbonbrief.org · 12/02/2025
NEW: Global EV sales grew 18% year-on-year in Jan 2025 Was this due to the "devastating collapse" of 21% growth in Europe? The "stalling" 12% growth in China? Maybe the "plunging" 22% rise in US/Canada? Or "faltering" 50% rest-of-world growth…? Data: Rho Motion 🤷‍♂️
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Our World in Data @ourworldindata.org · 07/02/2025
In 2004, it took the world a year to add a gigawatt of solar power — now it takes a day
A line graph depicting the average number of days it took to install a gigawatt of solar energy capacity worldwide from 2001 to 2023. The vertical axis represents the number of days on a logarithmic scale, spanning from 1 to 1000 days. The horizontal axis indicates the years from 2001 to 2023. 

In 2004, the average time was about 1 year, which is marked on the graph. A downward trend shows significant decreases in installation time over the years. By 2010, it took under 30 days, and by 2015, just over 7 days. The most notable point is in 2023, where it dropped to about 1 day on average for installation. 

The data source is attributed to IRENA (2024), with calculation by Our World in Data, and the chart is identified as CC BY, indicating it is licensed for sharing and adaptation with appropriate credit.
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Stephen Cornelius @climatesteve.bsky.social · 06/02/2025
Worth looking at this deck of trends around the world: #ClimateChange already has consequences- from coffee, panama canal drying, to 3-years rain in a day in Valencia Fossil fuel use continues to rise Wind, solar, EV investments up, but not fast enough to compensate for increasing #energy demand
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Copernicus ECMWF @copernicusecmwf.bsky.social · 05/02/2025
How unusual were 2023 and 2024 compared to the global warming trend, averaging an increase of around 0.2°C per decade? Dive into the analysis of anthropogenic and natural factors 👉 bit.ly/40kQpcz
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James Murray @james-bg.bsky.social · 02/02/2025
This is a very strong argument in favour of climate action from @elpinchbeck.bsky.social that you don’t hear often enough. It is both conservative and progressive. www.thetimes.com/article/b729...
thetimes.com
UK’s net-zero guru: ‘Only Londoners say rural folk can’t adapt’
Emma Pinchbeck wants to dispel the myth that saving the planet will mean austere lifestyle changes and says the countryside is forever changing
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Stephen Cornelius @climatesteve.bsky.social · 28/01/2025
A beautiful Blue Dragon we spotted in a rock pool - they eat Portuguese man o' war and other similar siphonophores and absorb their stings as their own defence. The kids knew what it was from National Geographic, but I, and a long-time fisherman friend, had never heard of them!
Close-up photo of a 'Blue Dragon' sea slug (Glaucus atlanticus) on bright green algae of a rockpool
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Ember @ember-energy.org · 27/01/2025
Coal is nearing its end in the EU electricity mix 📉 10 countries were already coal-free and a further 6 countries had less than 5% coal power in 2024. Even Poland – the EU’s most coal-dependent country – saw coal power fall to 54% in 2024, down from 70% just 2 years ago. ember-energy.org/lat...
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IPBES @ipbes.net · 23/01/2025
Environmental risks dominate @weforum.org Global Risks Report 2025. Extreme weather & #biodiversity loss top 10-year threats. Pollution rises in short-term urgency. 🌍 The IPBES #NexusAssessment just showed how important it is to tackle interlinked crises together. www.weforum.org/stories/2025...
A chart by the World Economic Forum titled Global Risks Ranked by Severity. Extreme weather events and biodiversity loss and ecosystem collapse are ranked 1 and 2 respectively under long term (10 year) risks.
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Stephen Cornelius @climatesteve.bsky.social · 23/01/2025
Climate records broken like a broken record! It is worth a look at this report by #CopernicusClimate Change service The 2024 Annual Climate Summary Global Climate Highlights 2024 climate.copernicus.eu/global-clima... @copernicusecmwf.bsky.social #ClimateChange
climate.copernicus.eu
Global Climate Highlights 2024
This section looks at the global Climate Indicators for which data are available for all or part of 2023. For more details on each, visit the respective Climate Indicator page. The page will be update...
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Robin Harvey @robinharvey.bsky.social · 15/01/2025
Today #WEF published its Global Risks Report 2025, which identifies the top four most severe risks over the next ten years to be extreme weather events, biodiversity loss and ecosystem collapse, critical change to Earth systems and natural resources shortages www.weforum.org/press/2025/0...
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