Monsanto of the Sea?! This article fear-mongers vague “unintended consequences” as an ethical shortcoming of what they admit seems like a pretty solid concept for sequestering carbon - while never once mentioning the major unintended consequences of NOT trying to sequester carbon.

Capturing carbon in biomass is always a somewhat risky proposition by itself, because biomass can decompose and re-release the carbon. But even if the permanence is low right now, developing the skill of seaweed farming or any other carbon removal technology is a win - we can figure out how to increase permanence later as we scale up. No technology is fully developed at inception.