[entee]

Most of the methane comes from cattle belching, so it's basically impossible to harvest at scale. The lagoons of manure also do, and that can be harvested though it's hard.

https://climate.nasa.gov/faq/33/which-is-a-bigger-methane-so...

[entrep]

I came up with this solution: https://i.imgur.com/8BNktVY.png

[xchaotic]

I nominated you for IgNobel 2022