This is misleading crap!
Every modern landfill is set up with piping designed to capture the methane and route it to a standpipe where it is burned off.
Without such systems there is a hazard of fires or explosions.
Some landfills collect the methane and sell it to local manufactures at reduced rates because it is contaminated with undesirable trace gases.
[[Every modern landfill is set up with piping designed to capture the methane and route it to a standpipe where it is burned off. ]]
Those pipes are art pieces /s