NOVELTY - Converting a gas comprising oxides of carbon (COx) into biomass comprises contacting the gas with algae in an aqueous solution in at least one algal biological reactor (ABR), which converts at least a portion of the COx into biomass.    USE - The method is useful for converting a gas including oxides of carbon (COx), and oxides of nitrogen into biomass, preferably algae, which is used as protein in food applications, animal feed, hydrocarbon oil(s), combustion and/or fertilizer (all claimed).    ADVANTAGE - The method: utilizes ABR, which converts oxides of carbon and nitrogen in into biomass and harmless and useful biochemical products, where space utilization is optimal or significantly improved, materials of construction are improved and energy management is obtained regardless of ambient temperature; is environmentally friendly; economical; and feasible.    DETAILED DESCRIPTION - Converting a gas comprising oxides of carbon (COx) into biomass comprises contacting the gas with algae in an aqueous solution in at least one algal biological reactor (ABR) which converts at least a portion of the CO(x) into biomass. The ABR(s) includes at least one of: (i) a number of ABR(s) arranged side-by-side in a circular pattern forming an ABR cluster, (ii) a number of annular shaped ABR(s) comprising a tube within a tube, where the ABR(s) comprise the annular portion between the radii of outside and the inside tube, and photons enter each ABR from the center tube, (iii) at least one photon tube dispersing photons into each ABR (s), (iv) the ABR(s) aqueous solution comprises contact with photons, where the transfer of photons to the ABR(s) comprises at least one of a tube and a fiber optic cable, (iv) the ABR(s) comprise insulation, (v) the ABR(s) comprise a tubular shape comprising a gas tube dispersing the gas into the ABR(s), (vi) the ABR(s) comprise a continuous stirred tank reactor comprising at least one tube dispersing photons into each ABR(s) and/or (vii) the ABR(s) comprise a membrane for dispersing the gas into the ABR(s).