🚨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
2/ When allocating how to tackle emissions, respondents clearly prioritized immediate mitigation:
➡️ This shows people support #CDR, but believe deep emissions cuts must come first.
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.
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.
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.
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.
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
8/ Any notable differences across countries?
Countries share common ranking:
✅Renewables + behavior change 1st
✅AR over DACCS everywhere
• 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:
🚨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
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.
🚨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
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.
🚨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
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
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.