Sure, as a niche product for those who wish to play with such things but as a major addition to life?
They are growing three fast-growing species of kelp that can be used to make everything from a biodegradable alternative to a plastic bottles to an umami-rich condiment already stocked in Selfridges, as well as eco-friendly fertiliser and cattle feed.
Plenty of island type places used to do this. Use seaweed as fertiliser. Amazingly, they all stopped doing so the moment that artificial fertilisers became available.
Always a useful question about these returns to these old ways ideas. Why are they the old ways, why were they abandoned?
One guess about seaweed as fertiliser would be the amount of human labour that has to go into such a system…….