Waste that has not been reused or recycled with separate collection must not be destined immediately for disposal in landfills, but for the recovery of energy still available, giving them to the waste-to-energy plants, from which heat and electricity can be obtained, as well as a certain amount of metals.
Finally, the waste that cannot be sent to the waste-to-energy plant, the residues deriving from treatment and street cleaning must be sent to landfills