The Algal Turf Scrubber (ATS) is one of the marine ecology field’s best-kept secrets. Invented by Smithsonian scientist Dr. Walter Adey in the 1980s, the ATS harvests algae from large bodies of water and converts it to biomass that can be used to fuel cars, to treat illnesses, and, perhaps someday soon, to even power your cell phone. So why aren’t more people using the ATS system?