Algae was recently discussed in National Geographic Magazine as a biofuel that can be rapidly grown with low impact on the environment, and now PetroSun of Texas has announced that their algae farms are already producing biomass for conversion into algae oil for use as fuel.  PetroSun has farms and refinery capacity already set up to grow enough algae to produce 4.4 million gallons of algae-based fuel per year, and is poised to add more capacity if the initial results go as expected.