Methane emissions reduction covers the strategies fleets use to minimize methane released by their vehicles. Methane can escape from engines running on natural gas, from unburned fuel passing through the exhaust, and from fuel system leaks, so fleets running compressed or liquefied natural gas vehicles have the most to address, though diesel and gasoline fleets contribute smaller amounts too.

Methane matters because it is a potent greenhouse gas. Over a 20-year span, a ton of methane traps far more heat than a ton of carbon dioxide, so even small leaks and incomplete combustion add noticeably to a fleet’s climate impact. Reduction strategies include maintaining engines and fuel systems to prevent leaks and slippage, using exhaust aftertreatment that oxidizes unburned methane, monitoring emissions through telematics, and choosing fuels and engine technologies with lower methane output.

The most complete solution is fleet electrification, which eliminates direct methane emissions from the vehicle because there is no combustion and no onboard fuel to leak. Many fleets move toward it in stages, starting with the vehicles and routes best suited to electric operation while keeping emissions-focused maintenance in place for the rest. Tracking methane alongside other emissions gives fleets reliable figures for sustainability reporting and compliance.