Re: [HPAC] Advance in CO2 Capture

[John Nissen]

Hi Mike,

The best that can be done with CDR is to "slow global warming".  Everything points to the need to reverse global warming and bring down temperatures using Solar Geoengineering. This applies of course to tipping elements, however you define the tipping point.  Just slowing global warming, or to shave off the peak warming as you suggest, guarantees that most tipping processes will continue until their collapse point, condemning humanity to the consequences of collapse: e.g. AMOC collapse with its effect on climate around the planet, and Greenland ice sheet partial collapse with its devastating effect on sea level rise.  SG will have to continue until CDR has brought the CO2 level down below 360 ppm.  This requires removal at at least 60 GtCO2 per year for decades if SG is to be phased out this century. 

Am I scaremongering?  I think not.

BTW, this wonderful CO2-absorbent material cannot be scaled up to remove CO2 at the gigaton level.  We need to put gigatons of carbon in soils and/or oceans: this can be done by enhancing life in the soils and oceans.

Cheers, John

On Thu, Nov 20, 2025 at 5:59 PM Ron Baiman <rpba...@gmail.com> wrote:

Wow Mike!  This sounds almost too good to be true!  The next question of course is how does it scale in terms of resources, energy and cost. But it sounds fantastic.

Best,

Ron

Sent from my iPhone

On Nov 20, 2025, at 9:10 AM, 'Michael MacCracken' via Healthy Planet Action Coalition (HPAC) <healthy-planet-...@googlegroups.com> wrote:



Very interesting article. And if it could be worked out, perhaps the SRM for peak shaving would have to be done for only decades instead of centuries--and a way out of the Termination Shock criticism

See https://cdss.berkeley.edu/news/capturing-carbon-air-just-got-easier

Best, Mike

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