Better yet, reverse coal mining.
Dig massive holes and turn CO2 into pure Carbon blocks and bury it underground
I know flexbox isn't perfect, but this seems kind of-- ohhh, nevermind.
In summary, it's same CCS with a different CO_2 source, biogas. No CO_2 is removed from the atmosphere; gas which would otherwise by released can be capture. The paper discusses that capturing from biogas upgraders is more efficient than capturing from other sources. They not discuss the actual capture-and-storage process.
The problem with biomethane is that there isn't going to be enough of it.
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:
How much each change to the atmosphere has warmed the world:
Recommended actions to cut greenhouse gas emissions in the near future:
Anti-science, inactivism, and unsupported conspiracy theories are not ok here.