The layout is intriguing (and the kelp operation sounds interesting), but the problem I see is this is solely focused around carbon. Solutionism like this needs

The layout is intriguing (and the kelp operation sounds interesting), but the problem I see is this is solely focused around carbon. Solutionism like this needs to be paired with cultural change. Nothing about the other planetary boundaries covered such as geochemical flows, land-use change (which alters the distribution of water vapor, which is very important), methane use change, ocean acidification, etc.