๐ฐ Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (28 July - 03 August 2025):
๐:
๐งต0/21
Germanyโs 2026 draft budget allocated โฌ111 million for negative emissions in 2026 and a further โฌ320 million in subsequent years. A new federal department has also been set up to focus on carbon removal.
๐จHow does #SolarGeoengineering affect air pollution & public health?
New study using a cutting-edge Earth system model shows that #SAI has only modest effects on PMโ.โ & ozone-related mortality & these impacts are mostly due to climate shifts, not aerosol deposition.๐งต1/8 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 (Oโ) & fine particulate matter (PMโ.โ ) under future SAI deployment targeting 1.5ยฐC and 1.0ยฐC warming levels.
๐ฐ Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (21-27 July 2025):
๐:
๐งต0/22
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.
๐จScientists 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
DETAILS๐งต1/8 2/ Microbially induced calcite precipitation (MICP) is a technique where microbes precipitate CaCOโ, often used in eco-friendly building materials.
Most MICP uses urease to break down urea, which produces ammonium, a problematic byproduct.
Jul 22 โข 12 tweets โข 4 min read
๐จ๐Carbon Removal Events๐๐จ
Here's a list of what's coming up this week (22 July - 28 July 2025) in the field of #CarbonDioxideRemoval:
๐จSolar 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.
๐งต1/11 2/ SRM often gets touted as cheap even โpennies per tonโ 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.
๐จGlobal talk on #SolarGeoengineering is heating up but Latin Americaโs 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.๐งต1/8 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 โข 18 tweets โข 6 min read
๐จ๐Carbon Removal Events๐๐จ
Here's a list of what's coming up this week (08 July - 21 July 2025) in the field of #CarbonDioxideRemoval:
๐:
๐งต1/17 teamup.com/kshqbfhrqkw36sโฆ
EVENTโThis is CDR: Divert, Transform, Apply โ How BioForceTech is Removing CO2 by Turning Wastewater Sludge into Aggregate by @openaircollect
๐จGeorgia Tech researchers have developed a low-cost method to pull COโ 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
DETAILS๐งต1/9 2/ DAC is a critical tool for fighting climate change, but itโs been too expensive to scale.
Current systems often exceed $200 per ton of COโ captured, partly due to the high energy needed to run them.
Jul 9 โข 9 tweets โข 3 min read
๐จFrom Air to Stone๐จ
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
DETAILS๐งต1/8 2/ Some Kenyan fig trees, like Ficus wakefieldii, store COโ not just as organic matter (wood/leaves) but also as calcium carbonate (CaCOโ) - the same mineral as chalk or limestone.
This process is called the oxalate-carbonate pathway (OCP).
Jul 8 โข 16 tweets โข 6 min read
๐จ๐Carbon Removal Events๐๐จ
Here's a list of what's coming up this week (08 July - 14 July 2025) in the field of #CarbonDioxideRemoval:
๐ฐ Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (30 June - 06 July 2025):
๐:
๐งต0/19
@Climeworks raised $162 million SeriesโฏE to scale Generationโ3 direct air capture, cut costs to $400โ600/t, and grow its carbon removal portfolio.
๐จWhat if we bet too much on future carbon removal tech and it doesnโt 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 findings๐งต1/9 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.
Jul 1 โข 12 tweets โข 4 min read
๐จ๐Carbon Removal Events๐๐จ
Here's a list of what's coming up this week (01 July - 07 July 2025) in the field of #CarbonDioxideRemoval:
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๐งต1/11 teamup.com/kshqbfhrqkw36sโฆ
EVENTโThis is CDR - Embedding CDR: Unlocking Scale Through Industrial Integration with Cara Maesano, PhD. by @openaircollect
Check out some must-listen episodes:๐งต1/12
This episode dives into a radical proposal: using a buried nuclear explosion on the seafloor to break up basalt & speed up carbon removal via Enhanced Rock Weathering. The goal? Sequester 30 years of global CO2.
๐ฐ Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (09 June - 15 June 2025):
๐:
๐งต0/17
@InSoilClimate secured its largest funding to date through a โฌ100 million agreement with Key Carbon, accelerating regenerative agriculture and carbon credit generation across Europe.
๐จA new study [preprint] shows that injecting sulfur at 50km could make #SolarGeoengineering much safer.
It cools the planet more effectively, speeds ozone recovery & avoids stratospheric disruptions. This could be done using a fleet of clean, reusable H2 rockets.
DETAILS๐งต1/10 2/ SAI involves spraying SOโ into stratosphere, where it forms aerosols that reflect sunlightโcooling Earth. It mimics volcanic eruptions like Mt. Pinatubo (1991), which temporarily cooled the planet.
But current โSAI modelsโ inject SO2 at a rate of 10 Tg/yr at ~25km altitude.
๐จA new study has revealed for the first time that ancient carbon, stored in landscapes for thousands of years or more, can find its way back to the atmosphere as COโ is released from the surfaces of rivers at a rate of 1.2 billion tonnes per year.
Details๐งต1/8 2/ To understand the true source of river COโ, researchers compiled a global dataset of 1,195 radiocarbon measurements of dissolved inorganic carbon (DIC), COโ & CHโ from rivers & streams.
This let them determine whether the emitted carbon was modernโor much older.