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Many European countries (Germany, Sweden, Norway, etc) don't allow landfills for common household trash. The solution obviously has many facets. Mostly it breaks down to waste separation (e.g. different bins for plastics, compost and paper that are emptied for free, with high fees for the rest to encourage people to separate), recycling what you can and burning the rest. Burning trash produces energy and you can deal with produced gases at one central location, what's left after burning is easy to landfill because it's much less volume and basically doesn't decompose.

The result of what's incinerated is often used for construction, like for road bases. So it's turned into a valuable material instead of being wasted.

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