🚨A 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 CO₂ is released from the surfaces of rivers at a rate of 1.2 billion tonnes per year.

Details🧵1/8 2/ To understand the true source of river CO₂, researchers compiled a global dataset of 1,195 radiocarbon measurements of dissolved inorganic carbon (DIC), CO₂ & CH₄ from rivers & streams.

This let them determine whether the emitted carbon was modern—or much older.

🚨🗓Carbon Removal Events Calendar by Andrew Lockley!🗓🚨

Here's a list of what's coming up this week (03 June - 09 June 2025) in the field of #CarbonDioxideRemoval:

🔗:

🧵1/13 teamup.com/kshqbfhrqkw36s… EVENT—Carbon Removal Summit: Business Value in a Shifting Landscape by CUR8 Events

🗓03 June 2025 | London, England
🔗

2/13lu.ma/hn94fhf4

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (26 May - 01 June 2025):

🔗:

🧵0/21 Gresham House raised £500M to expand UK forestry and carbon removal, targeting 4.7M tonnes of CO₂ via nature-based credits.

1/21
esgnews.com/gresham-house-…

🚨A NEW study explores a theoretical #geoengineering approach to combat global warming — by altering Earth’s orbit.

Simulations suggest that shifting Earth ~5.8% farther from the Sun could cool the planet by roughly 7K, effectively offsetting projected warming.

DETAILS🧵1/10 2/ Climate models suggest global temperatures could rise by 7K by 2100, driven by greenhouse gas emissions.

This study asks: what if, instead of changing the atmosphere, we changed our position in space?
Specifically: increase Earth’s orbital radius.

🚨What’s ahead in #SolarGeoengineering?🚨

From research proposal deadlines to online events, in-person conferences, and job alerts — our SRM Events Calendar is packed with all key updates.

🔗:

Here’s what’s coming up in the SRM field:🧵1/13 teamup.com/ks64mmvtit583e… CALL FOR RESEARCH PRESENTATION PROPOSAL—RFF and the Harvard Solar Geoengineering Research Program invite individuals to present research at their upcoming workshop

🗓Deadline: 30 May 2025
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2/13rff.org/events/confere…

🚨🗓Carbon Removal Events Calendar by Andrew Lockley!🗓🚨

Here's a list of what's coming up this week (27 May - 03 June 2025) in the field of #CarbonDioxideRemoval:

🔗:

🧵1/15 teamup.com/kshqbfhrqkw36s… EVENT—This is CDR: Avnos' Water-Positive, Hybrid Direct Air Capture with Will Kain by @openaircollect

🗓27 May 2025 | Online
🔗lu.ma/xw0eh18o

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (19 May - 25 May 2025):

🔗:

🧵0/24 @AltCarbonIndia secured $12 million in seed funding to scale its enhanced rock weathering operations in South Asia.

1/24
alt-carbon.com/press-releases…

🚨Can a single particle both reflect sunlight and capture CO₂—offering a two-in-one tool for climate intervention?🚨

In a new study [preprint], researchers tested the idea with zeolite aerosols. Here's what they found:🧵1/6

#SolarGeoengineering #CDR #ClimateTech The concept: Inject aerosols into the stratosphere that not only reflect sunlight (like standard #SAI) but also adsorb CO₂ from the air.

Zeolites, known for their CO₂-trapping ability, seemed like a candidate for this dual function.

🚨AstroCool is a proposed emergency geoengineering plan by inventor David Chaum.

It involves mining moon dust & launching it into a space orbit between the Sun & Earth to shade the planet & restore pre-industrial temperatures.🧵1/12

#SRM #SolarGeoengineering #ClimateSolutions 2/ AstroCool (the “Plan X” initiative) was unveiled by Chaum as a backup climate fix.

It proposes using centrifugal lunar launchers and robotic “droid” satellites to fling regolith into the Sun–Earth L1 point, creating a sunshade that cuts incoming sunlight.

🚨🗓Carbon Removal Events Calendar by Andrew Lockley!🗓🚨

Here's a list of what's coming up this week (20 May - 26 May 2025) in the field of #CarbonDioxideRemoval:

🧵1/17 EVENT—2025 Annual Convening by Carbon to Sea Initiative

🗓19-21 May 2025 | Washington
🔗

2/17carbontosea.org/2025-convening/

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (12 May - 18 May 2025):

🔗:

🧵0/23 Riverse has secured €5 million in seed funding to expand its carbon crediting platform for engineered CDR.

1/23
riverse.io/blog/carbon-cr…

🚨NEW STUDY: We could trap 18 billion kilos of CO₂ a year by tweaking how we treat our wastewater.

How? By adding alkaline rocks like olivine—turning treatment plants into climate allies. A quick thread🧵1/7

#CDR #CarbonRemoval #ClimateSolutions 2/ Carbon dioxide removal is about pulling CO₂ out of the air and locking it away.

One such technique, OAE, helps the ocean absorb more CO₂ by increasing its alkalinity, which reduces surface ocean acidity.

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (05 May - 11 May 2025):🧵0/17 Stockholm Exergi and Microsoft have extended their BECCS carbon removal deal from 3.33 to 5.08 million tonnes over ten years, making it the world’s largest annual agreement at 500,000 tonnes per year.

1/17
esgnews.com/microsoft-expa…

🚨🗓CDR REMINDERS!🗓🚨

Here's a list of what's coming up this week (06 May - 12 May 2025) in the field of #CarbonDioxideRemoval:

🔗🗓️Link to the CDR Events Calendar:


#CDREvents #CDRJobs #Deadlines

🧵1/13 teamup.com/kshqbfhrqkw36s… EVENT—Sponsored CarbonX Info Session: Millions of USD for CDR and more! by @openaircollect

🗓06 May 2025 | Online
🔗

2/13lu.ma/05mrg40o

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (28 April - 04 May 2025):

🔗:

🧵0/21 Mirova announced a $40M investment in carbon projects across Argentina, Costa Rica, and Madagascar to restore 40,000 hectares, sequester 9.5M tonnes of CO₂, and support local communities.

1/21
impact-investor.com/mirova-invests…

🚨How much land will CDR take?

New research shows that large-scale #CDR—essential for 1.5°C or 1°C climate goals—could demand vast land areas if we rely on energy crops, potentially up to 10% of today’s cropland. But tech-based sol could greatly reduce that burden.

DETAILS🧵1/8 2/ Most CDR plans today focus on bioenergy with carbon capture (#BECCS), reforestation, and afforestation. These options are land-intensive. This study compares them with other portfolios that prioritize low land use, low cost, high tech readiness, and security.

🚨🗓CDR REMINDERS!🗓🚨

Here's a list of what's coming up this week (29 April - 05 May 2025) in the field of #CarbonDioxideRemoval:

🔗🗓️Link to the CDR Events Calendar:


#CDREvents #CDRJobs #Deadlines

🧵1/13 teamup.com/kshqbfhrqkw36s… EVENT—Marine Carbon Removal Fireside by Seoi.Cure CDR x Women in Carbon

🗓29 April 2025 | London, England
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2/13lu.ma/1vyqin0b

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (21 April - 27 April 2025):

🔗:

🧵0/25 @xprize announced the winners of its $100M CDR competition. The grand prize of $50M went to @mati_carbon for ERW. Other awards included $15M to @NetZero, $8M to @VaultedDeep, $5M to @undocarbon & $1M each to Planetary & Project Harar.

1/25
xprize.org/prizes/carbonr…

🚨A recent field study conducted over the Great Barrier Reef has provided key insights regarding sea spray aerosols (SSA).

For the first time, it shows that SSA can reach the cloud base height, advancing Marine Cloud Brightening (#MCB) research.

DETAILS🧵1/8 2/ MCB is a proposed climate intervention that aims to reflect more sunlight by enhancing marine clouds.

The concept relies on artificially generated sea spray aerosols (SSA) at the ocean surface and their transport in sufficient quantities to low-level maritime clouds.

🚨A new 3-year study found that by combining crushed rock + compost + biochar could remove 51.7 million tons of CO₂e/year—just by treating 8% of California’s rangelands.
#ERW #CDR #biochar

Here’s the details:🧵1/9 2/ Researchers spread finely crushed metabasaltic rocks across test plots in Browns Valley, California, in each of 3yrs.

Along with the crushed rock, some of the applications included compost or a combination of compost & biochar (burned pine & fir left over from local logging).

📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (14 April - 20 April 2025):

🔗:

🧵0/18 Microsoft has entered into the world’s largest carbon removal agreement, securing a 15-year contract to purchase 6.75 million metric tons of permanent CDR from AtmosClear, a subsidiary of Fidelis, utilizing BECCS technology.

1/18
reuters.com/sustainability…