Geoengineering, carbon removal news via @andrewjlockley & team.
Also see Geoengineering Google group. Chemtrailers/deniers instablock. RT=/=E
Aug 22 • 13 tweets • 3 min read
🚨Can aeosols counter AMOC collapse?
A NEW study suggests Stratospheric Aerosol Injection (#SAI) could help prevent the decline of the Atlantic Meridional Overturning Circulation (#AMOC), but only if aerosols are injected in the appropriate latitude & hemisphere.
DETAILS🧵1/12 2/ The AMOC is a key component of Earth’s climate system, transporting heat and nutrients across the Atlantic.
Its decline, already underway, is projected to accelerate under global warming, possibly approaching a tipping point this century.
Aug 21 • 12 tweets • 4 min read
🚨Enhanced Rock Weathering (#ERW) could remove up to 700 Mt CO₂ by 2070 in the UK if quarry production scales 5–10×.
Larger extraction sites boost efficiency but raise major social, logistical & policy challenges.
A new @CommsEarth study models the trade-offs.🧵1/11 2/ ERW involves spreading crushed silicate rocks on croplands to capture CO₂.
While previous studies examined its chemistry & agronomic benefits, this work focuses on the supply chain: can the UK sustainably scale rock extraction to meet net-zero needs?
Aug 17 • 21 tweets • 6 min read
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝
📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (11 August - 17 August 2025):
🔗:
🧵0/19
Carbon removal company @equatic_tech raised $11.6M Series A led by Temasek Trust’s Catalytic Capital and Kibo Invest.
🚨A new CSIRO-led study finds Australia can achieve net-zero emissions cost-effectively by 2050 if it acts early.
Rapid decarbonisation of electricity, scaled #CarbonRemoval, and strategic land offsets are central to success.
Details🧵1/9 2/ The research adapts the IEA’s global net-zero scenarios to Australia’s economy using an integrated economic–energy model.
It compares a Rapid Decarbonisation pathway, consistent with limiting warming to 1.5 °C, with a Stated Policies path leading to ~2.6 °C by 2100.
Aug 10 • 20 tweets • 6 min read
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝
📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (04 August - 10 August 2025):
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🧵0/18
Evero’s Ince biomass plant will be converted into the UK’s first BECCS site by 2029, capturing 217,000 t CO₂/year, processing 170,000 t waste wood, and powering 100,000+ homes.
🚨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.
Aug 3 • 24 tweets • 7 min read
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝
📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (28 July - 03 August 2025):
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🧵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.
Jul 27 • 24 tweets • 7 min read
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝
📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (21-27 July 2025):
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🧵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.
Jul 22 • 12 tweets • 4 min read
🚨🗓Carbon Removal Events🗓🚨
Here's a list of what's coming up this week (22 July - 28 July 2025) in the field of #CarbonDioxideRemoval:
🚨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.
Jul 20 • 25 tweets • 7 min read
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝
📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (14-20 July 2025):
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🧵0/23
Frontier facilitated $1.75M in CDR purchases from Karbonetiq, Limenet & pHathom for buyers including Stripe, Shopify & Google.
🚨Global talk on #SolarGeoengineering is heating up but Latin America’s barely in the room.
A new study analyzes the #MakeSunsets case in Mexico & shows why Latin America & the Caribbean need urgent, inclusive SRM governance to prevent risks & protect real research.🧵1/8 2/ With climate risks growing, solar radiation modification is gaining attention globally.
Yet in the Latin America & the Carribean (LAC) region, it's still a marginal topic, largely absent from political agendas, public debate, and regulatory systems.
Jul 15 • 18 tweets • 6 min read
🚨🗓Carbon Removal Events🗓🚨
Here's a list of what's coming up this week (08 July - 21 July 2025) in the field of #CarbonDioxideRemoval:
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🧵1/17 teamup.com/kshqbfhrqkw36s…
EVENT—This is CDR: Divert, Transform, Apply – How BioForceTech is Removing CO2 by Turning Wastewater Sludge into Aggregate by @openaircollect
🚨Georgia Tech researchers have developed a low-cost method to pull CO₂ from the air (#DAC) using cold temperatures and common materials, potentially slashing capture costs to ~$70 per ton and expanding where Direct Air Capture can work. #CDR
DETAILS🧵1/9 2/ DAC is a critical tool for fighting climate change, but it’s been too expensive to scale.
Current systems often exceed $200 per ton of CO₂ captured, partly due to the high energy needed to run them.
Jul 9 • 9 tweets • 3 min read
🚨From Air to Stone🚨
New study revealed that Kenyan fig trees can literally turn parts of themselves to stone, using microbes to convert internal crystals into limestone-like deposits that lock away CO2, sweeten surrounding soil & still yield fruit. #CarbonRemoval
DETAILS🧵1/8 2/ Some Kenyan fig trees, like Ficus wakefieldii, store CO₂ not just as organic matter (wood/leaves) but also as calcium carbonate (CaCO₃) - the same mineral as chalk or limestone.
This process is called the oxalate-carbonate pathway (OCP).
Jul 8 • 16 tweets • 6 min read
🚨🗓Carbon Removal Events🗓🚨
Here's a list of what's coming up this week (08 July - 14 July 2025) in the field of #CarbonDioxideRemoval:
📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (30 June - 06 July 2025):
🔗:
🧵0/19
@Climeworks raised $162 million Series E to scale Generation‑3 direct air capture, cut costs to $400–600/t, and grow its carbon removal portfolio.
🚨What if we bet too much on future carbon removal tech and it doesn’t deliver?
New study shows that over-relying on #CDR like DACCS & BECCS could let fossil fuel emissions continue longer, delay action, and raise costs later.
Key findings🧵1/9 2/ Many net-zero plans assume large-scale CDR. But techs like direct air capture (DACCS) & bioenergy with CCS (BECCS) are tiny today and scaling them is risky due to land, energy & cost barriers.