It's a cool idea but I don't see how this is a viable long term solution, even if done at a large scale. Global oil production is on the order of 90M barrels/year, each barrel contains about 300 lbs of oil, so we're currently producing something like 27B lbs (~12B kg) of oil per year. I'm not sure how much of this ends up as CO2 in the atmosphere versus e.g. plastics, but I think it's safe to say we're probably emitting at least 1B lbs/kg carbon into the atmosphere per year just based on these numbers.
Seaweed grows quickly, but it's almost entirely water by mass, and this strategy will really only work in coastal regions. If this strategy was adopted at a wide scale globally how much time does this really buy us? And this isn't even considering things like the unknown ecological effects of the plan.
Seaweed grows quickly, but it's almost entirely water by mass, and this strategy will really only work in coastal regions. If this strategy was adopted at a wide scale globally how much time does this really buy us? And this isn't even considering things like the unknown ecological effects of the plan.