The claim, sunlight + CO2 = fuel
See
NYT: Biotech Company to Patent Fuel-Secreting Bacterium
The organism can grow in bodies of water unfit for drinking or on land that is useless for farming, according to the company, Joule Unlimited
GCC: Joule Awarded Patent on Renewable Diesel Production Directly from Sunlight and CO2Joule’s microorganisms function as biocatalysts that use only sunlight, waste CO2 and non-fresh water to directly and continuously produce diesel-range hydrocarbons, which are chemically distinct from biodiesel and are compatible with existing infrastructure.
FC: Revealed: Bacteria That Turns Sunlight Into Fuel
