The methane will eventually break down in to CO2 on it's own, so whether your burn it or not you'll get that CO2. However before it breaks down methane is a wi

The methane will eventually break down in to CO2 on it's own, so whether your burn it or not you'll get that CO2. However before it breaks down methane is a wildly more potent greenhouse gas. It still takes decades to break down, during which time it's going to be multiple magnitudes more impactful that the CO2 it will eventually become either way.