🚨New Viewpoint published in Frontiers that responds to Siegert et al.’s paper.

While Siegert et al. warn against polar #geoengineering, Moore et al. argue for a compassionate harm-reduction paradigm, keeping geoengineering research open alongside decarbonization.

Details🧵1/12 2/ Siegert et al. [] critically assessed polar geoengineering proposals, urging restraint.

Their case: interventions are risky, may not work, and could distract from the essential task which is deep decarbonization.frontiersin.org/journals/scien…

🚨New Nature Geoscience study shows that blooms of Phaeocystis antarctica (microalgae) in the Southern Ocean ~14,000 yrs ago massively drew down CO₂, stabilizing climate. Their decline today could have global consequences.
#CarbonSink #CarbonDrawdown

Details🧵1/9 2/ Microalgae are pivotal in the Southern Ocean carbon cycle.

A new study from the Alfred Wegener Institute (AWI) reveals that during the Antarctic Cold Reversal (14.7–12.7k yrs BP), algal blooms slowed the rise of atmospheric CO₂.

🚨New study finds #SolarGeoengineering methods have divergent hydrological outcomes in China.

Only equatorial Stratospheric Aerosol Injection (#SAI) could mitigate the “North-Drought, South-Flood” pattern, while MCB & CCT risk worsening it.

DETAILS🧵1/11 2/ China’s hydroclimate is long shaped by the NDSF pattern: aridity in the north, flooding in the south.

Warming threatens to intensify this divide via glacier retreat and stronger monsoon variability.

How would climate interventions alter this?

🚨Researchers at the KAIST and the @MIT have developed a new fiber-based material that can capture CO2 directly from the air using only small amounts of electricity, potentially lowering the barriers to large-scale deployment of direct air capture (#DAC) technology.

DETAILS🧵1/8 2/ DAC systems, which remove CO2 directly from ambient air, have long been hindered by their high energy requirements.

With atm CO₂ concentrations at less than 400ppm, vast volumes of air must be processed, typically requiring large amounts of heat.

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (25 August - 31 August 2025):

🔗:

🧵0/20 Frontier signed a $31.3M deal with Planetary to scale ocean alkalinity enhancement, aiming to remove 115,211 tCO₂ at $270/t from 2026–2030.


1/20frontierclimate.com/writing/planet…

🚨In a new study published in @OneEarth_CP, researchers reveal that human land activities have stripped away roughly 24% of terrestrial carbon stocks (equivalent to 344 billion metric tons of C), underscoring an urgent need to reframe land-use & climate policy.

Details🧵1/10 2/ Plants + soils store more carbon than the atmosphere + all fossil reserves combined.

But farming, grazing, and forest use have stripped away this natural shield, turning land from a carbon bank into a carbon source.

🚨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.

🚨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?

📝💡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.

1/19
eco-business.com/press-releases…

🚨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.

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (04 August - 10 August 2025):

🔗:

🧵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.

1/18
bioenergy-news.com/news/evero-bio…

🚨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.

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 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.


1/21linkedin.com/posts/dvne_cdr…

🚨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.

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 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.


1/22carbonherald.com/chestnut-secur…

🚨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.

🚨🗓Carbon Removal Events🗓🚨

Here's a list of what's coming up this week (22 July - 28 July 2025) in the field of #CarbonDioxideRemoval:

🔗:

🧵1/11 teamup.com/kshqbfhrqkw36s… EVENT—Food, Ag & Regen Farming + Biotech & Life Sciences Call by 4WARD

🗓23 July 2025 | Online
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2/11circle.4ward.earth/c/events/food-…

🚨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.

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (14-20 July 2025):

🔗:

🧵0/23 Frontier facilitated $1.75M in CDR purchases from Karbonetiq, Limenet & pHathom for buyers including Stripe, Shopify & Google.


1/23frontierclimate.com/writing/summer…

🚨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.

🚨🗓Carbon Removal Events🗓🚨

Here's a list of what's coming up this week (08 July - 21 July 2025) in the field of #CarbonDioxideRemoval:

🔗:

🧵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

🗓15 July 2025 | Online
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2/17lu.ma/4mr8gbc9