"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
🚨A new study warns that efforts to cool the planet through stratospheric aerosol injection (#SAI) could face far greater challenges than models predict, from unpredictable monsoon shifts to material shortages & engineering limits, every step adds new risks.
🧵1/8 #SRM
2/ The authors explore both micro-level (engineering) and macro-level (governance & supply) factors that could restrict feasible deployment.
Key finding: these constraints could drastically raise costs, risks, and uncertainty, especially for “solid” (non-sulfate) aerosols.
3/ Traditional SAI uses sulfate aerosols (like volcanoes).
But alternatives, CaCO₃, TiO₂, Al₂O₃, ZrO₂, even diamond, promise less ozone damage.
Yet producing, aerosolizing, and dispersing these solids in submicron form is technically daunting.
🚨French Academy of Sciences has released a new report on #SolarGeoengineering, stressing that the absolute priority must remain reducing GHG emissions via structural changes & accelerating adaptation to climate impacts.
On #SRM, the report offers several recommendations:🧵1/6
2/ SRM Recommendation 1️⃣
Promote an international agreement aimed at prohibit any initiative, public or private, to deploy SRM, regardless of the framework or scale.
To do this, the entire scientific community will have to be involved.
3/ SRM Recommendation 2️⃣
Support & deepen research on climate, atmospheric physicochemical processes and biodiversity in order to be able to rigorously assess the potential & risks of SRM.
🚨An analysis of forest-based projects funded through the sale of #CarbonCredits shows that 10% of them may have a net warming effect on the climate because of the way they alter the Earth’s #albedo, or how much sunlight is reflected back into space.
DETAILS🧵1/12
2/ Albedo is how much sunlight Earth’s surface reflects vs. absorbs
Forests are darker than grass or snow, meaning they absorb more heat
So when grasslands or snowy areas are turned into forests, Earth’s surface can absorb more heat, partly cancelling out cooling effect of #CDR
3/ So, this study analyzed 172 Afforestation, Reforestation & Revegetation projects in the Voluntary Carbon Market - projects that collectively aim to deliver nearly 800 million tons of CDR over the next century.
But none of these projects’ standards account for albedo change.