Spiralis Energy's screw-like tidal power generator made from plastic trash seeks trial in UK

https://interestingengineering.com/energy/screw-like-tidal-energy-generator-uk

"large Archimedes screw modified by addition of aerofoils increasing torque, greater energy output... screw submerged, bu power generation happens above water in drier conditions... modular, 3D printed before shipping... if broken, modular section removed/ replaced for easy repair... 66 feet long... mounted on floating platforms... lowest energy cost energy generation among all types of energy generation worldwide... 500 kW at 3.5 m/s power output"