NOVELTY - Method of processing methane emissions for the production of a harvestable product, comprises: providing a gaseous emission comprising methane; providing methanotrophic microorganisms; and exposing the methanotrophic microorganisms to the gaseous emission, where the methanotrophic microorganisms use at least a portion of the methane as a source of carbon or energy; and where the methanotrophic microorganisms produce a harvestable product after using the methane as a source of carbon or energy.    USE - The method is useful: for processing methane emissions for the production of a harvestable product (polymer (preferably polyhydroxyalkanoate, polyhydroxybutyrate or polyhydroxybutyrate-valerate), microorganism biomass, methane monooxygenase, protein-rich biomass, enzymes, cellular contents, a quantifiable reduction in methane emissions, heat or electricity) for commercial or industrial sale or use; and for producing a biodegradable polymer (claimed).    ADVANTAGE - The method reduces environmentally-destructive methane emissions/pollutants without relying on altering the methanotrophic microorganisms. The method: enables the viable and economical utilization of methanotrophic microorganisms in the treatment and utilization of methane emissions; enables methanotrophic methane emissions treatment without depending on a reduction in capital or operating costs; enables the viable and economical application of methanotrophic microorganisms to methane emissions treatment in environments where a reduction in the concentration of methane emissions is not required; provides a methanotrophic methane emissions treatment process that is economically competitive with alternative methods of methane emissions treatment; provides a sustained treatment and utilization of methane emissions; has the capacity to significantly reduce global methane emissions; converts a wasted form of energy and environmentally-destructive greenhouse gas into a useful end-product; and reduces atmospheric ruminant animal methane emissions without requiring ruminant animals to alter their normal/natural behavior patterns (including sleeping and nutrient-consumption), feed reformulations, selective breeding activities, or chemical/microbial modifications to the digestive systems of ruminant animals. The method provides the environmentally friendly polymers.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for:    (1) producing a biodegradable polymer from landfill gas comprising: obtaining landfill gas, where the landfill gas comprising methane; conveying the landfill gas to a bioreactor, where the bioreactor contains methanotrophic microorganisms and growth medium; enclosing the landfill gas in the bioreactor; and inducing the methanotrophic microorganisms to produce a biodegradable polymer by substantially reducing or depleting the growth medium of any nitrogen, thus producing the biodegradable polymer; and    (2) processing methane emissions and producing harvestable products; or processing methane emissions produced by ruminant animals, comprising: a source of gaseous emissions; a bioreactor that encloses or contains the methanotrophic microorganisms; and a conveyer that conveys the gaseous emissions into the bioreactor, thus exposing the methanotrophic microorganisms to the gaseous emissions and causing the methanotrophic microorganisms to produce a harvestable product after using the methane as a source of carbon or energy; or an enclosure for enclosing the ruminant animals; a methane-consumption means; and a conveyer.