I think quite a few countries combine both systems vs we seem to try to separate it.
For instance, I believe there are some countries that have both recycling and trash bags, but both bags are sent to the same location. Whatever is trash is incinerated and whatever is recyclable is recycled. Recycle bags are also sorted at these locations and the trash in them is incinerated. Thereby, the stuff is properly sorted before it gets contaminated. Anyone who is putting garbage in the recyclable bags get charged more (as a fine or as a cost of the increased work to sort their stuff). However, I think the reverse is true where recyclables in the trash bag is also fined or charged more.
IMO, we should incinerate things and then bury whatever is left over rather than just straight bury things straight up. It takes up less space, takes far less time to break down and assuming it's properly sorted before incineration, allows for a proper system of recycling to take place. But I'm not an expert and I assume there's other issues I haven't thought of in this set up.
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