As oil and gas production in British Columbia increases and new shale gas prospects emerge across Canada, stakeholders are calling on industry and governments to address fugitive methane emissions from the oil and gas sector. [...] Both industry and regulators face challenges in monitoring emissions from oil and gas infrastructure at the level of devices and components, due to the sheer number of them across the supply chain (National Gas Machinery Laboratory 2006). [...] We present the case that emissions pricing and existing regulations cannot solve the methane problem, given the limited scientific understanding of the amount of methane escaping from oil and gas infrastructure. [...] Escaping Methane across the Oil and Gas Supply Chain Similar to Mexico and the United States, Canada estimates methane emissions from oil and gas infrastructure for Intergovernmental Panel on Climate Change (IPCC) greenhouse gas reporting purposes from limited measurements, industry surveys, and emissions factors. [...] Across the continent, scientists are discovering that the reported estimates of methane emissions from the oil and gas sector are systematically underestimated in comparison to measured emissions.