Just do it - algae

"China, has mobilized thousands of people and an armada of small boats to clean up an algal bloom choking the coastline and threatening to impede the Olympic competition.

Harvested" algae is transported to local processing centers and used to make feed and fertilizer by companies, including China Ocean University Organism Project Development.  The company uses algae in three ways, namely feed additives, organic fertilizers and materials for healthcare products, said Shan Junwei, president of the company."