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Alternative Lives R Available's avatar

Good post, and very well researched! Thank you.

I will add a couple of comments:

Rarely mentioned is the energy required to capture carbon is not insignificant. Most carbon capture technologies need considerable energy to scale to any meaningful level of carbon capture, and where will that energy come from, especially as it will presumably need to be close to the sites identified for carbon storage. Like out at sea!

Secondly, despite over 20 years of discussing carbon capture and various technologies and businesses touting their successes, not one, single scaleable, costed system currently exists that has captured more than a token 'test' quantity of atmospheric carbon dioxide.

The last time I looked, the most advanced system was the Orca project by Climeworks in Iceland. The plant can capture 4,000 metric tonnes of CO2 per year, so to scale up such a facility to capture just 5% of the excess CO2 emissions (total around 40 billion tonnes of CO2 a year) means capturing 2 billion tonnes and would require 500,000 such installations.

They would consume 3,000 kWh of electricity each, so the resulting energy consumption would be around 5 terraWatt Hours . That works out about 20% of the current world's electricity consumption!

Just a reminder, those numbers are for just 5% excess CO2 production, and even if it were possible to achieve 100% excess capture (which it is already obvious we cannot), then that would not reduce the excess already in the atmosphere, so would not reduce the climate heating effects of current CO2 levels already underway! Or indeed deal with all the other carbon gases like methane!

The whole situation is so ridiculous, it beggars belief.

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Walt Svirsky's avatar

While your pace may have slowed a tad, your quality persists, my friend. You have been a wonderful addition to my literary diet and have greatly increased my understanding of climate change.

Ignorance is bliss, so yours is an uphill battle.

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