Former environmental engineer here. Landfills are not that bad indeed but only if they’re properly constructed - i.e. concrete bed poured, geological survey don

Former environmental engineer here. Landfills are not that bad indeed but only if they’re properly constructed - i.e. concrete bed poured, geological survey done beforehand and the seepage of stuff into the ground and settling is continuously monitored. The problem is that constructing _proper_ landfills is hideously expensive so regulations are skirted all over the world. Then you have problem of the stuff decomposing and seeping into groundwater, etc. It’s not all milk jugs and bottles. It’s paint, batteries, motor oil, old non-RoHs electronics that seep mercury and lead everywhere, etc. That’s the main problem with landfills.