There is a striking difference between atmospheric methane concentrations reported for the northern (high) and for the southern (low) hemispheres.
There is also a subtle seasonal fluctuation indicating higher methane levels in winter than summer months.
Seasonal switching of wave phenomena from northern to southern hemispheres reinforces seasonal causes.
Improving burning efficiencies, gas handling, and distribution could help nominalize seasonal variations?
Stopping oil and gas production, for say a year, might help identify real problems and remedial approaches.