AFAIK, seaweed farming at scale is the best know way to remove carbon from the ocean - which is desperately needed to reverse acidification. Farming seaweed for

AFAIK, seaweed farming at scale is the best know way to remove carbon from the ocean - which is desperately needed to reverse acidification. Farming seaweed for food is good, but you have to build the market a lot too. Cattle feed and biofuels would be great drivers of scale for this.