Cardboard, per a story that was on HN a few weeks ago, is both almost entirely recyclable and has economic value. So the problem with cardboard isn’t even that it’s wasted, but that it’s being stolen from trash bins for recycling.

https://www.bbc.com/news/business-53724620

It’s one of the reminders that the invisible hand of economics, incentivised properly, can solve not all, but a surprising lot.