NOVELTY - A waste management facility (e.g. a landfill facility (10)) comprises an air circulation control facility (30) and a liquid introduction system (40), for waste mass (12); a monitoring mechanism to monitor temperature, waste mass moisture content and/or waste mass pH; a control mechanism for adjusting air circulation and liquid introduction, to control waste mass temperature and pH, to create an optimum environment for deactivating methanogenic bacteria and isolating and maximizing hydrogen producing bacteria; and a gas collection system (46) to collect hydrogen produced by the bacteria.    USE - As a waste management facility e.g. landfill facility; useful for production of hydrogen gas, and for reduction in production of greenhouse gases; useful in management of waste mass incorporated with municipal sludge, selected soils, specific food wastes, organic substrates, inoculating materials, soils containing trace elements, selective trace element additives or cover soils (claimed); useful for management of solid and liquid wastes.    ADVANTAGE - The waste management facility is provided with operational control of the waste mass for optimum hydrogen production; and achieves reduction in production of greenhouse gases.    DETAILED DESCRIPTION - A waste management facility (e.g. a landfill facility (10)) comprises an air circulation control facility (30) co-operating with a waste mass (12); a liquid introduction system (40) co-operating within the waste mass; a monitoring mechanism to monitor temperature, waste mass moisture content and/or waste mass pH; a control mechanism for adjusting air circulation and liquid introduction, to control waste mass temperature and pH, to create an optimum environment for deactivating methanogenic bacteria and isolating and maximizing the number of hydrogen producing bacteria; and a gas collection system (46) for collecting hydrogen produced by the hydrogen producing bacteria. The monitoring and control mechanisms are part of monitoring and control facilities (42).    DESCRIPTION OF DRAWING(S) - The figure shows a schematic of a landfill facility.    landfill facility (10)    waste mass (12)    air circulation control facility (30)    piping of air circulation control facility (32)    valves (36)    liquid introduction system (40)    monitoring and control facilities (42)    gas collection system (46)    collection piping. (51)