Methane emissions reduction refers to interventions that capture or combust methane — a greenhouse gas roughly 80 times more potent than CO2 over 20 years — before it vents to atmosphere, converting it into electricity or heat. In the Bitcoin context, miners co-locate with flared gas, landfill or agricultural waste sites and use the otherwise-wasted methane to power mining hardware, turning a stranded liability into monetised, lower-carbon energy. It is cited as a mitigating factor in assessments of Bitcoin’s environmental footprint.