In the years since the discovery of significant concentrations of lipids in certain species of algae, estimates for the potential of the single-cell water-borne plant have varied wildly. What is agreed is the substantial potential for algae to become a valuable resource in the portfolio of second generation biofuels. The tiny plants can produce-at least 15 times more oil per hectare than alternatives like jatropha, rapeseed and palm, and are 20 times as productive as corn and soy. Today, high-end food supplements are still the main algal product, but some estimate their fuels could compete with petroleum at US$60 per barrel.
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