Landfills burn it when they aren't equipped to power a generator with it. This also reduces the greenhouse gas impact, as the combustion byproduct is mostly pla

Landfills burn it when they aren't equipped to power a generator with it. This also reduces the greenhouse gas impact, as the combustion byproduct is mostly plain CO2 and water. CO2 is also a greenhouse gas, but not as bad as methane. Either way, it has to be collected and burned off.