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@geoengineering1

Dec 11

🚨'Rock candy' technique offers simpler, less costly way to capture C directly from air

U of Toronto engineers have developed a cheap, passive, string-based #DAC system that crystallizes CO₂ like “rock candy,” potentially cutting capital costs by up to 40%.

How it works🧵1/11

Direct air capture has existed for decades, but it’s expensive. Giant fans, complex chemical plants, and energy-intensive regeneration steps drive up costs. That’s the main criticism of today’s DAC industry.

U of Toronto researchers tackled the problem with a simple question:
What if we could let nature do most of the work?

Their answer: evaporative carbonate crystallization, a passive, wind-powered approach.

Read 12 tweets

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@geoengineering1

Dec 5

🚨🗞️Monthly Solar Geoengineering Updates (November Edition)

From the U.S. stratospheric-cooling patent to Global South funding, cautious UK–EU stances, tipping-point modeling & a surge in chemtrail chatter, #SRM captured global attention.

Top 10 SRM Highlights (Nov 2025)🧵1/6:

➡️@MakeSunsets secures its first US patent for stratospheric cooling tech

➡️Climate scientists remain skeptical of SRM, favor research over deployment, per @SZ (Garman newspaper) survey

➡️Royal Society sees SRM’s potential but stresses it can't solve climate change alone

🧵2/

➡️London Protocol reiterates precaution on marine geoengineering deployment

➡️UK reiterates it is “not in favor” of SRM deployment but open to debating regulation

➡️Studies warn SAI may cut protein in staple crops & destabilize yields for coffee, cacao & wine

🧵3/

Read 7 tweets

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@geoengineering1

Dec 3

🚨A new modeling study finds Stratospheric Aerosol Injection (#SAI) could lower risks to many of Earth’s #TippingPoints, but not all.

High-latitude deployment best protects ice sheets & permafrost, while low-latitude deployment favors rainforests & coral reefs.

DETAILS🧵1/14

2/ Tipping elements are highly sensitive to warming.

This study analyzes how different SAI designs (equatorial, mid-latitude, high-latitude & multi-objective strategy) influence the drivers of these tipping systems under SSP2-4.5.

3/ Across most tipping elements, SAI decreases risk relative to continued warming, but magnitude & direction of response are strongly pattern-dependent.

CO₂-driven warming & SAI-driven cooling aren't climatic mirror images - SAI can over- or under-compensate regional changes

Read 15 tweets

Geoengineering Info

@geoengineering1

Nov 26

🚨New study reveals a major hidden C sink in the deep ocean: ancient talus breccias - piles of broken basalt formed along seafloor faults - can trap & store CO₂ for tens of millions of years, potentially offsetting a significant share of mid-ocean ridge emissions.

DETAILS🧵1/10

2/ Researchers made the discovery while drilling 60-million-year-old seafloor in the South Atlantic.

They found talus breccias containing ~7.5 wt% CO₂ - the highest carbon content ever measured in upper ocean crust, up to *40 times richer than previously sampled basalts.

3/ Why so much C?

These breccias form when steep faults at slow-spreading ridges collapse, creating piles of fractured rock with high natural porosity (~19%).

Over millions of yrs, cold seawater circulates thru rubble & precipitates carbonate minerals, trapping dissolved CO₂

Read 11 tweets

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@geoengineering1

Nov 22

🚨Soil food webs boost carbon retention in farmlands

A new study reveals that simply returning crop residues to fields can supercharge soil food webs, enabling microbes, nematodes & fungi to lock significantly more photosynthetic C into farmland soils.

Details🧵1/8 #CarbonSink

2/ Researchers from the Institute of Applied Ecology, Chinese Academy of Sciences (CAS), used field trials and ¹³C isotope tracing to map how carbon fixed by crops travels into soil and through the soil food web.

3/ FINDINGS:

Returning crop residues (stover) emerged as a key driver:

It increased particulate organic carbon (POC) by ~30.96% & mineral-associated organic carbon (MAOC) by ~11.39% compared with plots where stover was removed.

Read 9 tweets

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@geoengineering1

Nov 19

🚨New research shows how integrating Direct Air Capture (#DAC) with urea production - paired with CO₂ pricing can slash emissions, reach cost parity with fossil-based urea by 2050 & reshape global fertiliser markets through policies like the EU #CBAM.

DETAILS🧵1/9 #CDR

2/ What DAC-urea is?

It's urea fertilizer made with CO₂ pulled directly from the air instead of CO₂ from fossil fuels.

Air-captured CO₂ + green ammonia → urea.

Same fertilizer, but far lower climate impact.

3/Study presents a framework combining process modelling, prospective LCA & TEA to compare DAC-urea with conventional fossil-based urea today & under 2050 climate scenarios, including a cross-country assessment of Denmark’s clean electricity system & Egypt’s more C-intensive grid

Read 10 tweets

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