Earlier quoted context omitted.
Per the article, most of the sites were landfills, dairy farms, and natural gas facilities. All of those are directly controlled by consumer demand.
It's not all landfills, it's a small collection of landfills. And if they aren't fixed, even if everybody went zero waste today, those landfills would still be emitting large amounts of methane. Proper landfill design & operation ensures the landfill is aerated, which keeps decomposition primarily aerobic which produces little methane. A poorly designed or operated landfill with little aeration will switch to aerobic…
As I said elsewhere in this post, you can cut emission but population growth offsets all the benefits. You cannot address climate change without drastic long term reduction in human activity/population.