🚨New research out on US public perceptions of #SolarGeoengineering:
More Americans oppose SRM research than support it, and 1 in 5 believe government-led atmospheric modification is already underway.
DETAILS🧵1/11
2/ Using 64 interviews, 10 focus groups, and a survey of 3,076 Americans, the study found strong initial rejection of solar radiation modification (#SRM) as a research priority.
Skepticism, fear of unintended consequences, and concern over “playing God” were dominant themes.
3/ Only 32.6% supported further SRM research. A notable 43.7% opposed it. For comparison, support was ~80% in similar studies from a decade ago. Enthusiastic support is now virtually nonexistent in qualitative responses.
4/ SRM remains unfamiliar to most: 57.5% of survey respondents said it was entirely new to them. But once introduced, many respondents voiced instinctive rejection. Strong opposition was often driven by moral concerns and distrust in scientific overreach.
5/ When support for research did exist, it was reluctant and conditional. People expressed the need for more data before endorsing deployment.
Crucially, 71% preferred SRM research to be conducted by universities, not governments or companies.
6/ Belief in ongoing geoengineering is no longer fringe. 20.6% of Americans said it's somewhat or completely true that the US government is already putting chemicals into the atmosphere to counter global warming. 49.6% were unsure.
7/ This belief is not best understood as misinformation. The authors introduce the concept of “para-environmentalism” - a permutation of environmental concern, rooted in skepticism of elite institutions, that blends conspiratorial and ecological anxieties.
8/ Chemtrail beliefs and weather modification suspicions clustered more around younger, female, conservative, and less-educated respondents.
But uncertainty spanned all political affiliations, suggesting public confusion more than ideology.
9/ Focus group quotes show that distrust in environmental governance fuels para-environmentalism.
Participants cited failures in recycling, lack of transparency in policy, and “feeling manipulated” by elites - undermining trust in any new intervention.
10/ The study critiques the “deficit model” of public engagement, i.e., simply feeding the public more facts. Instead, it calls for two-way dialogue, empathetic listening, and locally grounded education to address both cognitive and emotional concerns.
📝For more details, read the study entitled "Public concerns about solar geoengineering research in the United States" here:
📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (28 July - 03 August 2025):
🔗:
🧵0/21
Germany’s 2026 draft budget allocated €111 million for negative emissions in 2026 and a further €320 million in subsequent years. A new federal department has also been set up to focus on carbon removal.
🚨How does #SolarGeoengineering affect air pollution & public health?
New study using a cutting-edge Earth system model shows that #SAI has only modest effects on PM₂.₅ & ozone-related mortality & these impacts are mostly due to climate shifts, not aerosol deposition.🧵1/8
2/ Using CESM2-WACCM6 simulations across three scenarios (SSP2-4.5 baseline, ARISE-SAI-1.5, ARISE-SAI-1.0), the study quantifies global mortality attributable to ozone (O₃) & fine particulate matter (PM₂.₅) under future SAI deployment targeting 1.5°C and 1.0°C warming levels.
3/ Findings:
In the ARISE-SAI-1.5 scenario, maintaining global mean temp at 1.5°C above pre-industrial levels via SAI results in:
- 1.26% reduction in ozone-related mortality
- 0.86% increase in PM₂.₅-related mortality during 2060–2069, relative to SSP2-4.5.
📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (21-27 July 2025):
🔗:
🧵0/22
Chestnut Carbon secured up to $210M in non-recourse financing, led by J.P. Morgan for its afforestation project, marking a first-of-its-kind deal in the US carbon removal space.
🚨Scientists have discovered a common soil bacterium, Bacillus megaterium, that can rapidly remove CO2 from the atmosphere by transforming it into solid limestone (calcium carbonate) within 24 hours, without creating toxic byproducts.
#CDR #CarbonMineralization
DETAILS🧵1/8
2/ Microbially induced calcite precipitation (MICP) is a technique where microbes precipitate CaCO₃, often used in eco-friendly building materials.
Most MICP uses urease to break down urea, which produces ammonium, a problematic byproduct.
3/ Bacillus megaterium is unique in a sense, it contains both urease and carbonic anhydrase (CA) enzymes. The latter allows it to fix CO₂ directly without needing urea.
But which pathway dominates? This study investigated that.
🚨Solar Geoengineering (#SRM) may seem cheap (~$18B/yr) to cool the planet, but when you factor in societal risks, political instability & sudden climate rebounds, the true cost may far exceed technical estimates from both moral & practical standpoints, says a new study.
🧵1/11
2/ SRM often gets touted as cheap even “pennies per ton” compared to the hundreds of $/ton needed for large-scale CDR.
But these estimates usually ignore the real-world costs of deploying SRM in a politically fractured and climate-damaged world.
3/ The authors outline four cost domains that traditional SRM estimates often miss:
1️⃣ Compensation for harms
2️⃣ International coordination
3️⃣ Domestic political feasibility
4⃣ Termination Shock
Each could add major financial & political costs. Details below: