You may never look at pond scum the same way again.......

Currently most research into efficient algal-oil production is being done in the private sector, but if predictions from small scale production experiments bear out then using algae to produce biodiesel, bioethanol and biobutanol may be the only viable method by which to produce enough automotive fuel to displace current world gasoline usage.[17]

Microalgae have much faster growth-rates than terrestrial crops. The oil yield per unit area of algae is estimated to be 5,000 to 20,000 gallons per acre, per year (4.6 to 18.4 l/m2 per year); this is 7 to 30 times greater than the next best crop, Chinese tallow (699 gallons).[18]
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....................The corporations Chevron, Honeywell, and Boeing are starting algae businesses. According to Boeing's technology leader for energy and emissions, Dave Daggett, 'In the past two years, we have changed from algae skeptics to proponents'. [21] The development challenge is to reduce the cost of producing algae oil in commercial volumes, i.e. billions of gallons.....................................................................................................................................................................Algae can be used as a biological source for the production of hydrogen. In 1939 a German researcher named Hans Gaffron, while working at the University of Chicago, observed that the algae he was studying, Chlamydomonas reinhardtii (a green alga), would sometimes switch from the production of oxygen to the production of hydrogen. [22] ........................................................................................................................................................Algae can be grown to produce biomass, which can then be harvested and burned in the same manner as wood, to produce heat and electricity.[23] ....................................................................................................................................................................Through the use of algaculture grown organisms and cultures, various polymeric materials can be broken down into methane .........................................................................................................
..................There are processes for vegetable oil refining that can produce gasoline, diesel, propane, or kerosene from the oil extracted from algae.