By locating the farm in previously empty space between turbines, the project is able to expand seaweed cultivation in the otherwise heavily used North Sea. If seaweed farming were to expand to occupy the entire space occupied by wind farms, expected to be approximately 1 million hectares by 2040, it could reduce millions of tonnes of CO2 annually.
I saw some interesting research on Algae and Seaweed while visiting the Scottish Association of Marine Science a few years ago. Amazon are moving the technology forwards
https://www.sams.ac.uk/facilities/seaweed-nursery/
