[offsetr]

Throw a chunk of steel/iron into the sea

[gus_massa]

Is this a joke or the idea is that the iron will be like a fertilizer to algae that will sequester more carbon and die and sink to the bottom?

(Is it posible to use raw mineral ore? The production of steel/iron use a lot of carbon.)

[DanBC]

https://www.scientificamerican.com/article/iron-dumping-ocea...

https://phys.org/news/2016-03-seeding-iron-pacific-carbon-ai...

https://en.wikipedia.org/wiki/Iron_fertilization

[offsetr]

No its not a joke there's multiple processes one of which is the algae fertilizer. It's a very efficient carbon sink.

[gus_massa]

It looks like a joke, so it was downvoted when I saw it. It remembered some project to add iron to the sea, so I hoped that it was a serious proposal.

Try to avoid onliners, it's very easy to misinterpret them. (Bonus points for a link to Wikipedia or somewhere with more details.)