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Lots of people have been working on this for a long time. But it's a very hard problem.

See for example

+ https://www.salk.edu/harnessing-plants-initiative/

+ https://www.slcu.cam.ac.uk/news/wood-modification-boosts-bio...

+ https://news.mongabay.com/2023/07/genetically-engineered-tre...

+ https://www.nytimes.com/2023/02/16/science/genetically-modif...

> Are trees the plants which capture most CO2 per hectare?

I'm struggling to find exact numbers per hectare, and it's only one of several important metrics (e.g. speed of capture, longevity, ecosystem effects).

From my readings I believe a combined strategy of species-diverse reforestation and algae breeding (perhaps GM, though I don't know enough) would be optimal.

Edit: as noted by others below, wetlands preservation and extension would also be great.



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