[flexiflex]

Why? carbon goes into the seaweed, seaweed gets turned into bioplastic which contains that carbon. Bioplastic is used and then discarded into a composter. Composter degrades the bioplastic, the carbon (and other nutrients) are in the compost that is created?

[cjensen]

Composting does not sequester carbon. Yes it would replace mineral carbon, but that is not what sequester means.