NOVELTY - A biologically pure isolate of a bacterium capable of producing products including alcohol e.g. ethanol and optionally acetate, is new. The bacterium produces products by anaerobic fermentation of a substrate comprising carbon monoxide (CO), where the products are produced at an ethanol to acetate ratio of at least 1.    USE - As biologically pure isolate useful for producing products including ethanol and optionally acetate from a substrate containing CO obtained from steel mill, automobile exhaust fumes, and from industrial process selected from ferrous metal products manufacturing, non-ferrous products manufacturing, petroleum refining processes, gasification of biomass, gasification of coal, electric power production, carbon black production, ammonia production, methanol production and coke manufacturing process (claimed). The ethanol is used as hydrogen-rich liquid transport fuel.    ADVANTAGE - The isolate of bacterium produces products at an ethanol to acetate ratio of at least 1 (preferably at least 1.2). The productivity of the bacterium is at least 1.2 (preferably at least 2) g of ethanol/l of fermentation broth/day. The biologically pure isolate has little or no ability to sporulate. The method reduces the total atmospheric carbon emissions from industrial process e.g. ferrous metal products manufacturing. The method selects growing micro-organisms in faster rate.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following:    (1) an acetogenic bacterium having at least one characteristic selected from an ability to grow in minimal media in the presence or absence of yeast extract; an ability to grow more rapidly, to produce a higher ratio of ethanol to acetate, and/or to produce a higher concentration of ethanol, in a media in which yeast extract is not present compared to a media in which yeast extract is present; little to no ability to sporulate; gram positive; rod shaped; and non-motile;    (2) a method for the production of at least one alcohol involving fermenting a substrate containing CO using at least one bacteria;    (3) a method for reducing the total atmospheric carbon emissions from an industrial process, involving capturing CO-containing gas produced as a result of the industrial process, before the gas is released into the atmosphere; and anaerobic fermentation of the CO-containing gas to produce alcohol by a culture containing at least one bacterium; and    (4) a method of selection of at least one micro-organism which produce at least one acid, involving culturing the micro-organisms in a nutrient media in a bioreactor; adding fresh media at a pH higher than the nutrient media, such that the nutrient media is maintained at a constant pH; and removing at least a portion of the nutrient media and micro-organisms, such that the media in the bioreactor is maintained at a constant volume.