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Other uses

Other seaweed may be used as fertilizer, compost for landscaping, or to combat beach erosion through burial in beach dunes.

Seaweed is under consideration as a potential source of bioethanol.

Alginates are used in industrial products such as paper coatings, adhesives, dyes, gels, explosives and in processes such as paper sizing, textile printing, hydro-mulching and drilling. Seaweed is an ingredient in toothpaste, cosmetics and paints. Seaweed is used for the production of bio yarn (a textile).

Several of these resources can be obtained from seaweed through biorefining.

Seaweed collecting is the process of collecting, drying and pressing seaweed. It was a popular pastime in the Victorian era and remains a hobby today. In some emerging countries, seaweed is harvested daily to support communities.

Seaweed is sometimes used to build roofs on houses on Læsø in Denmark.