TECHNOLOGY FOCUS - BIOLOGY - Preferred Method: The method comprises: enclosing the ruminant animals in an enclosure, thus at least partially enclosing the gaseous emissions; providing a methane-consumption means which can use the methane for the production of the product; conveying the gaseous emissions to the methane-consumption means; and causing the methane consumption means to process the methane to generate the product. The method further conveying gaseous or methane emissions from a secondary source to the methane-consumption means, where the secondary source is coalmine, landfill, natural gas site, manure digester, wastewater treatment plant or agricultural site.Preferred Components: The ruminant animals emit gaseous emissions through enteric fermentation. The methanotrophic microorganisms comprise: naturally-occurring and/or genetically-modified microorganisms, that use methane as a source of carbon or energy for growth or reproduction; and a microorganism Methylococcus capsulatus, Alcaligenes acidovorans Bacillus firmus or Bacillus brevis. The product comprises microorganisms. The enclosure is a barn, greenhouse, or other structure that substantially contains the animals or the emissions.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The gaseous emission comprises a gas of carbon dioxide, ammonia, nitrous oxide or ozone. The product is polymers, heat or electricity.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: The method further comprises: harvesting the harvestable product for commercial or industrial sale or use; substantially reducing or eliminating the concentration of nitrogen available to the methanotrophic microorganisms; removing any impurities from the gaseous emission; disinfecting the gaseous emission using ultraviolet light; and reducing the concentration of methane to a concentration compliant with applicable environmental regulations or laws.Preferred Components: The gaseous emission comprises: unpurified landfill gas or partially purified landfill gas; methane (0.1-10 % or preferably 30-60 %); carbon dioxide (30-60 %); and a non-methane compound (preferably an organic compound, toluene, benzene, methanol, propylene, alkenes, alcohol, ether or trichloroethylene), where the non-methane compound is metabolized, consumed, or used by the methanotrophic microorganisms; airborne materials and at least one other gas. The gaseous emission is generated by a system of coal mine, wastewater treatment operation, agricultural digester, enclosed feedlot, petroleum transport system, petroleum recovery system or ruminant animals (preferred). The other gas comprises ammonia. The methane consumption means comprises methanotrophic microorganisms. The methane consumption means is methanotrophic microorganisms, fuel cells, catalytic combustion engines, turbines or reverse-flow reactors. The methane consumption processes the methane by oxidizing, metabolizing, degrading, or consuming the methane.    TECHNOLOGY FOCUS - POLYMERS - Preferred Components: The harvestable product is a polymer (preferably polyhydroxyalkanoate, polyhydroxybutyrate or polyhydroxybutyrate-valerate), microorganism biomass, methane monooxygenase, protein-rich biomass, enzymes, cellular contents or a quantifiable reduction in methane emissions.