> Glass isn't biodegradable either, but for some reason that's OK. Regular glass in the environment is eventually pulverized into dust, it doesn't react with m

> Glass isn't biodegradable either, but for some reason that's OK. Regular glass in the environment is eventually pulverized into dust, it doesn't react with much of anything, and if the little bits that persist longest in the environment are ingested by an animal, it's handled biologically like any other nontoxic stone or grit. Pretty much the worst you can say about its environmental effect is that the broken bits can be pretty sharp when they're new and it's rather heavy, making disposal and recycling expensive in some respects. Plastic is quite different.