Algae are economically very important. Some algae are useful while few are harmful as well.
1. As food
E.g. Porphyra, Ulva etc.
2. As fodder
e.g. Ficus, Laminaria, Sargassum etc.
3. Commercial products
e.g. Agar Agar, Charageenan, Alginate, Diatomite etc.
4. Research and Education
+Pathogenic Algae e.g. Cephaleuros (Red Rust of Tea disease)
+Corrosion (water supply pipes, marine vessels)
+Water bloom formation
+Production of Toxin (Microcystis)
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