One of the best ideas I've run across to fight this (aside from stopping the sources of the problem) is vertical ocean farming. You grow kelp on cables hanging

One of the best ideas I've run across to fight this (aside from stopping the sources of the problem) is vertical ocean farming. You grow kelp on cables hanging vertically in the water column, interspersed with mussels, oysters and scallops. The kelp feeds on the nitrogen and phosphorus runoff and release oxygen and the bivalves filter the water. The small scale work done so far shows the water gets cleaner and local fish population increases. Kelp grows incredibly quickly and it can be eaten by humans and animals or used as fertilizer. The farming can be done by experienced watermen who probably have suitable boats but are underemployed due to fishing restrictions. https://www.greenwave.org/ https://www.greenwave.org/ https://ideas.ted.com/vertical-ocean-farms-that-can-feed-us-and-help-our-seas/ https://ideas.ted.com/vertical-ocean-farms-that-can-feed-us-...