Methane is a greenhouse gas. It's more polluting than c02. Removing it from the environment is a good thing but creating more is not a good thing for global warming. I suspect for it to be an alternative to oil, an such, we would need to create it not just remove it from landfills.

Compressed natural gas is mostly methane but we are trying to move away from fossil fuels so it's not a long term solution.

Here's a link that gives some info on it:

https://www.reuters.com/article/us-usa-gas-climatebox-explai...