Methane (CH4) is a potent greenhouse gas that traps significantly more heat than carbon dioxide over short timeframes, though it breaks down faster in the atmosphere. Major methane sources include natural gas systems (leaks during extraction and distribution), agriculture (livestock digestion and manure), landfills (decomposing organic waste), and wetlands. Reducing methane emissions is increasingly prioritized in climate strategies because the benefits are felt relatively quickly. Canada has committed to international methane reduction targets. Municipal actions affecting methane include landfill gas capture, food waste diversion programs, and policies affecting natural gas use in buildings.