NOVELTY - The environmental photobioreactor array system comprises environmental photobioreactor arrays, and a processor that transmits instructions to the components of the modular photobioreactors after processing information received from sensors in the modular photobioreactors, where each array contains modular photobioreactors. The system is adapted: to monitor and modulate conditions within the modular of the photobioreactors and/or to measure physiological parameters of a biomass contained within the modular of the photobioreactors.    USE - The environmental photobioreactor array system is useful for extracting a biofuel from a biomass such as algae (claimed).    ADVANTAGE - The photobioreactor array system is capable of effectively and economically extracting the biofuel from the biomass in an environmentally-friendly manner.    DETAILED DESCRIPTION - The environmental photobioreactor array system comprises environmental photobioreactor arrays, and a processor that transmits instructions to the components of the modular photobioreactors after processing information received from sensors in the modular photobioreactors, where each array contains modular photobioreactors. The system is adapted: to monitor and modulate conditions within the modular of the photobioreactors and/or to measure physiological parameters of a biomass contained within the modular of the photobioreactors. The conditions comprise temperature, pH, gas concentration, cell density, nutrient concentration, waste concentration and/or product concentration. The physiological parameters of the biomass comprise photosynthetic productivity, biofuel production, biomass density, biomass growth rate, production of a selected product, waste production, absorption of nutrients, absorption and/or processing of a test agent. The modular photobioreactors comprise: a first modular unit comprising an inner vessel for holding the biomass; second modular unit comprising a sleeve that comprises a temperature control unit and sensors; and components consisting of a vessel for biomass, a biomass agitator, a light source, a temperature control unit, the sensors, a liquid entry portal, a gas entry portal and/or a sampling station. The sensors are a detector adapted to detect temperature, pH, gas concentration, cell density, nutrient concentration, waste concentration and/or product concentration. The biomass agitator comprises a magnetic stirrer and/or sparger. The vessel is adapted to be removable from a photobioreactor, filled with media, autoclaved and replaced within a photobioreactor. The photobioreactor comprises the vessel with: media adapted for growth, maintenance or testing of the biomass; and a light source adapted to illuminate a column of water within the vessel. The column is adapted to mimic sunlight penetration on a natural body of water. The system is adapted for testing: environmental conditions to optimize growth or photosynthetic activity of a selected biomass; a series of biomass species or biomass strains under selected environmental conditions; and absorption and/or processing of a drug, toxin, nutrient or waste material by the biomass and/or absorption and/or processing of a gaseous manufacturing byproduct by the biomass. INDEPENDENT CLAIMS are included for:    (1) a biofuel; and    (2) a method of extracting a biofuel from a biomass.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of an environmental photobioreactor array system.