I mean, it’s not a new thing. Maybe making it into jet fuel is. But in the US there are hundreds of landfills that capture the gas. DOE calls them “LFG” projects.

https://www.epa.gov/lmop/basic-information-about-landfill-gas

It’s been a policy initiative since at least the 90s, and it’s not just about reducing emissions. It’s a lost opportunity to collect what is essentially renewable energy.