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Rooftop algae a growth industry in Bangkok

Sept. 23 - Urban algae farming is gaining a foothold in Bangkok with the rooftop of one big hotel supporting a small but flourishing algae industry. Algae is well known as a source of biofuel, but the species being cultivated on the roof of the Novotel produces Spirulina, a vitamin-rich, so-called "superfood". Tara Cleary reports.

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