"They naturally extract CO2 from the air and use it as feed. The more CO2 plants absorb, the less CO2 remains trapped in the atmosphere." 2/6
As plants decompose, CO2
is released back to the air
"If left alone, plants are eaten by other organisms and releasing the carbon back to the carbon cycle within months."
3/6
Anoxic conditions slow decomposition
"In anoxic waters, plants decompose extremely slowly, effectively storing the carbon much longer." 4/6
The Black Sea is the ideal location
"It is the largest anoxic body of water on earth, 2km deep, surrounded by fertile lands. The Black Sea is the optimal environment allowing affordable, environmentally safe, gigaton scale #CarbonRemoval in this decade." 5/6
1️⃣ Solar geoengineering governance platform - A new SGRG initiative will develop transparency tools, disclosure systems and a research governance charter as SRM studies expand.
2️⃣ AMOC tipping warning & role of SRM - Nordic Council report highlights risks of an Atlantic circulation collapse and urges stronger monitoring and expanded research into climate intervention alongside emissions cuts.
🚨🐜Tiny fungus-farming ants have evolved the ability to capture carbon dioxide from air (#CDR) and convert it into a mineral layer on their bodies, forming a natural protective armour, a surprising biological mechanism reported by scientists in a new study.
Details🧵1/11
2/ The discovery comes from studying crowded ant nests where carbon dioxide can build up.
Instead of simply tolerating high CO₂, these ants appear to use the gas as a chemical resource inside their nest environment.
3/ Fungus-farming ants forage for vegetation to feed cultivated fungi that are grown inside their colonies. In turn, the fungi serve as the primary food source for the ants.
The high density of ants and fungi can result in high concentrations of CO2 inside the nests.
From Oxford lectures & London policy debates to GeoMIP in Tokyo, #SRM governance forums in Belgium & major gatherings across Vienna, US & beyond + key job & abstract deadlines. Here’s what’s coming up🧵1/22
🚨A new study finds that most enhanced weathering models overestimate CO₂ removal (#CDR) because they assume all added rock powder reacts, when in reality, soil structure & moisture mean much of the mineral surface never gets wet, cutting reaction rates by up to 97%.
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2/ Enhanced weathering (EW) works by spreading finely ground silicate rocks onto soils. When these minerals react with water and CO₂, they form bicarbonate, effectively removing carbon from the atmosphere.
But here’s the catch: no water contact, no reaction.
3/ Most large-scale CDR models assume that once rock powder is added to soil, its surface is “available” for reaction.
In reality, soils are complex porous systems. H2O does not evenly coat every particle.
So, this study asks: How much of the rock surface is actually wet
Four experts offer their thoughts on the potential security risks associated with sunlight reflection methods (#SRM), or solar geoengineering, highlighting the geopolitical complexity of the field.
Read here:🧵1/6
Burgess Langshaw Power argues climate change is now a security issue and SRM could be too, but warns against military control to avoid secrecy or an arms race.
2/6
Josh Horton says SRM isn’t a direct threat but could indirectly heighten geopolitical tensions if deployment disputes emerge.
🚨A new study in Communications Sustainability explores whether enhanced rock weathering (#ERW) can scale into a meaningful, equitable climate solution.
The headline: ERW could remove ~1GtCO₂/yr by 2100, but who deploys it, when & how fast will shape its global impact.🧵1/10
2/ Enhanced rock weathering works by spreading crushed silicate rocks on croplands.
These minerals chemically react with CO₂, locking carbon into stable forms while improving soil quality. It’s a rare intervention promising both climate mitigation and agricultural co-benefits.
3/ But technical potential alone doesn’t determine climate outcomes. The central question the paper asks is:
How does ERW adoption diffuse across countries under real-world economic, social, and political conditions?