Lightnews — Scholar-powered news

Joeri Rogelj @joerirogelj.bsky.social · 6d

Pope Leo XIV has reaffirmed the imperative to act upon climate change and environmental degradation.

This firm response to climate science deniers marks the 10th anniversary of his Predecessor Pope Francis' encyclical "On Care of Our Common Home".

www.bbc.com/news/article...

Pope Leo hits out at critics of global warming

In his first major statement on climate change, the pontiff criticises those who minimise climate change.

www.bbc.com

2 24 82

Reposted by Joeri Rogelj

IIASA @iiasa.ac.at · 6d

The third and final day of the #OvershootConference kicked off with an insightful report-back and reflection session, where theme leads shared insights from their discussions so far.

See insights from discussions on Day 2 in the thread below:

1 3 7

Reposted by Joeri Rogelj

IOPP Environment and Energy @iopp-environment.bsky.social · 8d

🌍New #ERL focus collection on #climate #overshoot is open!

Linked to @iiasa.ac.at Overshoots conference in Vienna this week. ERL Publisher Lauren Carter will be attending, email to discuss a contribution: [email protected]

📅Deadline: 30 April 2026
🔗 iopscience.iop.org/collections/...

1 4 9

Reposted by Joeri Rogelj

IIASA @iiasa.ac.at · 23d

@joerirogelj.bsky.social: “The pursuit of 1.5°C endures as a legal and ethical imperative. Overshoot does not erase this goal - it makes it more urgent.”
He called overshoot a test of our generation’s responsibility.
#ScienceInAction #ParisAgreement

1 5 10

Reposted by Joeri Rogelj

Grantham Institute - Climate Change and the Environment @granthamicl.bsky.social · 26d

Despite the centrality of equity in the Paris Agreement, no framework exists to allocate responsibilities for carbon dioxide removals among countries.

A new paper, co-authored by Imperial's Professor @joerirogelj.bsky.social, presents a framework for allocating CDR globally 🧵

2 5 5

Reposted by Joeri Rogelj

Carbon Brief @carbonbrief.org · 29d

NEW – Guest post: How the role of carbon storage has been hugely overestimated | @gidden.bsky.social @joerirogelj.bsky.social

Read here: buff.ly/QY7LyJ8

Guest post: How the role of carbon storage has been hugely overestimated - Carbon Brief

Removing carbon dioxide (CO2) from the atmosphere is widely expected to play a key role in meeting the goals of the Paris Agreement.

buff.ly

4 33 73

Joeri Rogelj @joerirogelj.bsky.social · Sep 4

The original paper in @nature.com can be found here:
www.nature.com/articles/s41...

A prudent planetary limit for geologic carbon storage - Nature

A risk-based, spatially explicit analysis of carbon storage in sedimentary basins establishes a prudent planetary limit of around 1,460 Gt of geological carbon storage, which requires making explicit ...

www.nature.com

2

Joeri Rogelj @joerirogelj.bsky.social · Sep 4

In a new study, we estimate how much geological CO2 storage capacity would be available when considering social, environmental, seismic and other risks.

Lead author @gidden.bsky.social wrote an extensive 🧵on the work 👇

Matthew Gidden @gidden.bsky.social · Sep 4

Our paper is out today in @nature.com where we assess a Prudent Planetary Limit for Geologic Carbon Storage:

www.nature.com/articles/s41...

A prudent planetary limit for geologic carbon storage - Nature

A risk-based, spatially explicit analysis of carbon storage in sedimentary basins establishes a prudent planetary limit of around 1,460 Gt of geological carbon storage, which requires making explicit ...

www.nature.com

1 5 17

Joeri Rogelj @joerirogelj.bsky.social · Sep 3

Yes - if we don't use any of it for fossil CCS and emit zero CO2 in the meantime.

You'll also have to tell me what's the latest on perfect reversability of global warming after overshoot though. :)

2 6

Reposted by Joeri Rogelj

Grantham Institute - Climate Change and the Environment @granthamicl.bsky.social · Sep 3

Coauthor @joerirogelj.bsky.social Rogelj, Director of Research at the Grantham Institute says:

“This study should be a gamechanger for carbon storage. It can no longer be considered an unlimited solution to bring our climate back to a safe level.

1 2 16

Joeri Rogelj @joerirogelj.bsky.social · Sep 3

If you want to know the details, read to open source @nature.com publication, led by @gidden.bsky.social online. /end
www.nature.com/articles/s41...

A prudent planetary limit for geologic carbon storage - Nature

A risk-based, spatially explicit analysis of carbon storage in sedimentary basins establishes a prudent planetary limit of around 1,460 Gt of geological carbon storage, which requires making explicit ...

www.nature.com

2 10 37

Joeri Rogelj @joerirogelj.bsky.social · Sep 3

CO2 removal will play a pivotal role in any future where we achieve net-zero CO2 and eventually net-zero GHG emissions. By acknowledging its scarcity and reserving it for essential and strategic uses, governments can design fairer, robust mitigation strategies that limit risks and harm. /7

1 4 20

Joeri Rogelj @joerirogelj.bsky.social · Sep 3

The bottom line of this study connects to previous work on legal limits to the use of CO2 removal, and robust decarbonisation strategies. /6

1 1 16

Joeri Rogelj @joerirogelj.bsky.social · Sep 3

It assumes every tonne stored CO2 was removed from the atmosphere (and not captured from fossil fuel combustion or industry sources).

And meanwhile no other CO2 emission are emitted.

0.7°C of global warming reversal is thus a clear ceiling, based on a central estimate of climate response. /5

1 24

Joeri Rogelj @joerirogelj.bsky.social · Sep 3

If every single ton of this 1,460 GtCO2 would be used to remove CO2 from the atmosphere, we could reverse 0.7°C of global warming.

And this estimate is a clear ceiling, because... /4

1 8 31

Joeri Rogelj @joerirogelj.bsky.social · Sep 3

1,460 GtCO2 (thousand four hundred sixty billion tonnes of CO2!) of practically available geological CO2 storage seems a lot, but lets translate this to its potential for reversing global warming to get a sense of magnitude. /3

1 16

Joeri Rogelj @joerirogelj.bsky.social · Sep 3

This comes with important consequences for long-term climate change mitigation scenario planning.

Geological CO2 storages moves from a virtually unlimited potential to a rather scarce resource, with a central estimate of 1,460 GtCO2, globally. /2

1 2 23

Joeri Rogelj @joerirogelj.bsky.social · Sep 3

NEW STUDY: How much CO2 can we safely store in geological formations?

In a new @nature.com study, we cross-check established academic and industry estimates with various risk factors.

We find a prudent geological CO2 storage limit that is about 10x smaller. /1

5 71 150

Joeri Rogelj @joerirogelj.bsky.social · Aug 28

Announcement:
Climate Science and Policy Event on 9 September 2025 by @iiasa.ac.at at the @royalsociety.org

Register if you're interested in attending in person. 👇

IIASA @iiasa.ac.at · Aug 27

🔍Session spotlight: Planetary Crisis and Overshoot Management at @royalsociety.org 📆 9 Sep, with @ukri.org 📲register here: iiasa.ac.at/events/sep-2...

1 3

Reposted by Joeri Rogelj

Grantham Institute - Climate Change and the Environment @granthamicl.bsky.social · Jul 23

⚖️Climate litigation is entering a new era 🌏

Thanks to attribution science, courts now have the tools to link climate impacts, such as floods, wildfires and extreme heat to major polluters — and assign legal responsibility. 🧵

📒 imperial.ac.uk/stories/polluters-on-trial

1 13 35

Joeri Rogelj @joerirogelj.bsky.social · Jul 14

www.tandfonline.com/doi/full/10....

Implications of states’ dependence on carbon dioxide removal for achieving the Paris temperature goal

Achieving the Paris Agreement’s long-term temperature goal of limiting global warming well below 2°C while pursuing efforts to limit it to 1.5°C requires rapid and sustained reductions in greenhous...

www.tandfonline.com

1

Joeri Rogelj @joerirogelj.bsky.social · Jul 14

New research on limits to CO2 removal (CDR). CDR is key to our ambition to stop adding climate pollution to the atmosphere. Because it's uncertain how much will be delivered and it clearly comes with risks of social & environmental side-effects, legal issues arise. This paper provides an overview. 👇

Rupert Stuart-Smith @rupertstuartsmith.bsky.social · Jul 14

🚨 Out now in @climate-policy.bsky.social: New research with @thomwetzer.bsky.social @rubenpruetz.bsky.social @joerirogelj.bsky.social Lavanya Rajamani, Marianne Wood and Ewan White: States are depending heavily on CO2 removal to meet climate targets, risking the Paris Agreement goal.

2 9 24

Reposted by Joeri Rogelj

Grantham Institute - Climate Change and the Environment @granthamicl.bsky.social · Jul 9

⛈️ @frediotto.bsky.social reviewed extreme weather, such as the LA wildfires, to show that climate change is outpacing adaptation efforts.

🎯 @joerirogelj.bsky.social warns that passing the 1.5°C goal only intensifies the legal & ethical obligations of the Paris Agreement.

buff.ly/dIdDn5a

2 1 4

Reposted by Joeri Rogelj

Joeri Rogelj @joerirogelj.bsky.social · Jun 23

What becomes of the 1.5°C goal now that global warming is approaching that level?🌍🔥🌡️

In a new @science.org Policy Forum we explain how the 1.5°C goal remains a critical legal & ethical benchmark, even as the world nears and may soon exceed 1.5°C of global warming🧵1/
www.science.org/doi/10.1126/...

The pursuit of 1.5°C endures as a legal and ethical imperative in a changing world

As the world nears 1.5°C of global warming, near-term emissions reductions and adequate adaptation become ever more important to ensure a safe and livable planet for present and future generations

www.science.org

1 42 66

Reposted by Joeri Rogelj

Grantham Institute - Climate Change and the Environment @granthamicl.bsky.social · Jun 26

From litigation to misinformation, and COP30 to populism, our panel discussion was a lively affair.

Thank you to all of our panellists, everyone who attended the event, our co-hosts, the EU Delegation to the UK. #COP30 #CountdownToCOP30

1 2