Take a step-by-step walkthrough of how their solution works in a 🧵 below ⬇️
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1️⃣ "@ebbcarbon with aquaculture farms, desalination plants, ocean research labs, and other industrial sites that process seawater."
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2️⃣ "Ebb intercepts existing salt water flows at the facility and processes the water before it returns to the ocean."
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3️⃣ "Using low carbon electricity, Ebb run the salt water through a stack of ion-selective membranes that separate it into acidic and alkaline solutions."
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4️⃣ "Ebb measure and monitor the pH level and volume of the alkalinity we produce in real time. This enables us to safely return it at levels within the ocean's natural pH variance."
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5️⃣ "Ebb return the alkaline solution to the sea, where it immediately lowers the acidity of the sea water locally."
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6️⃣ "Over weeks to months, the alkaline solution reacts with dissolved CO2 in seawater to create bicarbonate (HCO3), a stable form of carbon storage for 10,000+ years."
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7️⃣ "With more CO2 locked away as bicarbonate, the ocean will naturally equilibrate and sequester more CO2 from the air. Ebb measures the CO2 removed from the air using sensors in the water and ocean and carbonate chemistry models."
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8️⃣ "By partnering with the ocean, Ebb Carbon has the potential to be one of the most energy efficient and cost effective ways to reverse the impacts of climate change both locally and globally."
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🚨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.
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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.
🚨Can buildings remove CO₂ while cooling indoor air?
A new study shows that adding CO₂ capture units (#DAC) to building cooling systems can cut energy use by over 50% & remove atmospheric carbon, even in hot, humid places.
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2/ Buildings use a lot of energy. About 37% of global energy & 40% of CO₂ emissions.
Cooling is the biggest part, taking almost 40% of building electricity.
As the planet warms, cooling demand rises, creating a vicious cycle.
3/ Direct Air Capture extracts CO₂ directly from ambient air, unlike point-source capture.
But adsorption-based DAC struggles in humid environments: water competes with CO₂ for sorbent sites, making it very energy-hungry.
🚨A new study presents the 1st structural prototype of a planetary sunshade - a large space-based system at L1 designed to block some sunlight & cool Earth.
Using solar sails, deployable booms & CubeSat-based frames, it outlines a pathway for space-based #geoengineering.🧵1/11
2/ The planetary sunshade would function as a vast array of satellites at the Sun–Earth L1 point, collectively blocking ~1.8% of incoming photons - enough to reduce global temperatures by ~2 °C.
"Unlike #SAI or orbital dust, it promises uniform, reversible cooling."
3/ The team followed European spacecraft design standards, testing different ideas with decision matrices & computer simulations (finite element analysis) to choose materials & structures that could actually survive launch.
🚨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.
Their case: interventions are risky, may not work, and could distract from the essential task which is deep decarbonization.frontiersin.org/journals/scien…
3/ Moore et al. [] reply that this “consequences-based paradigm” (raising alarms to spur action), has dominated climate science for 50 years.