Geoengineering Info Profile picture
Oct 29 11 tweets 4 min read Read on X
🚨A major 6-country survey (N=5,310) finds Europeans support -ve emissions to meet climate goals, but strongly prefer nature-based solutions like afforestation over engineered options like Direct Air Capture. Trust hinges on benefits for nature & future generations.

🧵1/10 #CDR Image
2/ When allocating how to tackle emissions, respondents clearly prioritized immediate mitigation:

• Renewables: 37.3%
• Behavior change: 24.0%
• Nuclear: 20.2%
• NETPs: 18.5%

➡️ This shows people support #CDR, but believe deep emissions cuts must come first. Image
3/ So which NETPs do they support most?

2 approaches were evaluated:
🌲Afforestation/Reforestation (AR)
🏭Direct Air Capture + Carbon Storage (DACCS)

AR scored +1.91 vs DACCS +0.64

➡️ This means people are 4.36× more likely to support forests as the favored way to remove CO₂. Image
4/ What’s driving that gap?

Participants rated AR more positively on all key consequences:
• Better for nature, env & future gen
• More effective in limiting warming
• More likely to support other mitigation

➡️AR=climate action that restores ecosystems, not disrupts them. Image
5/ So where does DACCS struggle?

Respondents worry DACCS:
• Requires large energy resources
• Could delay the shift away from fossil fuels
• Carries uncertainty & risk underground

➡️ Approval rises only when every concern is addressed. Image
6/ How strong are these beliefs in predicting acceptance?

•AR acceptance mainly depends on belief it benefits nature
•DACCS acceptance depends on all consequences equally

➡️These perceptions explain ~60% of support for AR & 76% for DACCS. Image
7/ And what about local acceptance concerns?

• AR: slightly less acceptable in one’s own country, but still strong support

• DACCS is not less acceptable domestically. In Germany, Spain, Netherlands support is slightly higher locally.

➡️NIMBY isn’t the dominant narrative Image
8/ Any notable differences across countries?

Countries share common ranking:
✅Renewables + behavior change 1st
✅AR over DACCS everywhere

Notable differences:
•Spain & Lithuania: NETPs > nuclear
•Poland: nuclear > behavior change
•Netherlands + Germany: biggest AR–DACCS gap Image
9/ What does this mean for policy?

Europeans support a balanced strategy:

• Rapid decarbonization 1st
• NETPs strategically scaled
• AR as the public-trusted foundation
• DACCS built with transparency, strong governance & ecological safeguards
📝For more details, read the study entitled "Forest or machine? Public perceptions and acceptability of negative emissions technologies and practices across six European countries" here:


🧵10/10 #CDR #DAC #Forestslink.springer.com/article/10.100…
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More from @geoengineering1

Oct 22
🚨A new study warns that efforts to cool the planet through stratospheric aerosol injection (#SAI) could face far greater challenges than models predict, from unpredictable monsoon shifts to material shortages & engineering limits, every step adds new risks.

🧵1/8 #SRM Image
2/ The authors explore both micro-level (engineering) and macro-level (governance & supply) factors that could restrict feasible deployment.

Key finding: these constraints could drastically raise costs, risks, and uncertainty, especially for “solid” (non-sulfate) aerosols.
3/ Traditional SAI uses sulfate aerosols (like volcanoes).

But alternatives, CaCO₃, TiO₂, Al₂O₃, ZrO₂, even diamond, promise less ozone damage.

Yet producing, aerosolizing, and dispersing these solids in submicron form is technically daunting. Image
Read 9 tweets
Oct 19
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (13 October - 19 October 2025):

📺:

🧵1/25
Nordbex and Aker Solutions signed an MoU to develop Bio-CCUS plants across Europe.
mynewsdesk.com/se/nordbex-ab/…
Bain & Company has partnered with ZeroEx to scale up enhanced rock weathering projects.
qcintel.com/carbon/article…
Read 25 tweets
Oct 17
🚨Scientists built a device that captures carbon from the seawater and turns it into biodegradable plastic, using bacteria as a living bioreactor.

#CDR #mCDR #CarbonDioxideRemoval #Bioplastics

DETAILS🧵1/8 Image
2/ The system comprises 3 components:

1️⃣ C extraction

Traditional seawater electrolysis systems often fail within hours due to mineral buildup

To solve this, researchers designed a solid-state electrolysis unit that isolates sensitive ions using membranes & a solid electrolyte Image
3/ The modified design acidifies H2O, converting dissolved C (mainly bicarbonate & carbonate ions) into CO₂ gas for collection.

The prototype operated continuously for 22 days, processing 177 liters of seawater & extracting 6.54L of CO₂, with an energy use of 3 kWh/kg of CO₂.
Read 9 tweets
Oct 16
🚨French Academy of Sciences has released a new report on #SolarGeoengineering, stressing that the absolute priority must remain reducing GHG emissions via structural changes & accelerating adaptation to climate impacts.

On #SRM, the report offers several recommendations:🧵1/6 Image
2/ SRM Recommendation 1️⃣

Promote an international agreement aimed at prohibit any initiative, public or private, to deploy SRM, regardless of the framework or scale.

To do this, the entire scientific community will have to be involved.
3/ SRM Recommendation 2️⃣

Support & deepen research on climate, atmospheric physicochemical processes and biodiversity in order to be able to rigorously assess the potential & risks of SRM.
Read 7 tweets
Oct 11
🚨An analysis of forest-based projects funded through the sale of #CarbonCredits shows that 10% of them may have a net warming effect on the climate because of the way they alter the Earth’s #albedo, or how much sunlight is reflected back into space.

DETAILS🧵1/12 Image
2/ Albedo is how much sunlight Earth’s surface reflects vs. absorbs

Forests are darker than grass or snow, meaning they absorb more heat

So when grasslands or snowy areas are turned into forests, Earth’s surface can absorb more heat, partly cancelling out cooling effect of #CDR Image
3/ So, this study analyzed 172 Afforestation, Reforestation & Revegetation projects in the Voluntary Carbon Market - projects that collectively aim to deliver nearly 800 million tons of CDR over the next century.

But none of these projects’ standards account for albedo change. Image
Read 13 tweets
Oct 8
🚨New paper argues that rejecting Carbon Dioxide Removal (#CDR) on moral hazard grounds may itself be unjust.

Using a framework of transitional justice, they propose that CDRs can, if carefully governed, form part of a just transition to a livable climate.

🧵1/9 Image
2/ The authors note that with climate overshoot increasingly inevitable, the IPCC and Climate Overshoot Commission both view CDRs as unavoidable.

The question shifts from whether to use CDRs to how to deploy them justly.
3/ The authors apply transitional justice - a framework for navigating imperfect choices to reach fairer outcomes.

It asks: when can seemingly unjust actions (like risky technologies) be justified to achieve a more just, sustainable future?
Read 10 tweets

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