In Italy (and in most countries I’ve visited), waste sorting typically involves two distinct categories for compost and residual waste.
Question: Why is compost disposed of in a separate collection rather than with residual waste? Are there any environmental differences if it decomposes together with dry waste versus separately? Is it a matter of disposal efficiency, or is it simply another administrative complexity?
One reason is that you want to get organic waste out of your place within days or it’ll stink, attract insects or leave a mess. Whereas all other waste won’t and so you can use larger bins for convenience.