>Properly run landfill doesn’t hurt the environment in itself.
>[...] But a well run landfill site has [...] electricity generation from gases produced by decaying matter,
This sounds like a pipe dream. We don't even have reliable estimates on how much landfill outgas there is, much less a good system for burning it. It's believed to be largely methane, which would be valuable without further processing if it could be captured.
Incidentally, the word "methane" does not appear in the article at all, and no systems describing such a gas capture apparatus are mentioned. But just think about it: a landfill is enormous; they are some of the largest things humans ever build, and some of them are visible from low Earth orbit. How do you plan to capture all of the gas coming out of that? Be honest!
Meanwhile, incinerators (of various designs) work today, have almost all of the upsides of landfills with none of the downsides. The article dismisses incineration with a single reference (b), which is actually an article from Planet Money focusing on recycling. The actual source is probably a footnote within a footnote, because that's as much attention as Americans will pay to incineration, I guess.
I agree that we need to talk about recycling less, but the correct alternative is incineration, not landfills.