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the development of clean technologies more sparing in their use of natural resources;

reducing the quantity of waste produced through the re-use of products or the extension of their life spans;

the technical development and marketing of products designed so as to make no contribution or to make the smallest possible contribution, by the nature of their manufacture, use or final disposal, to increasing the amount of harmfulness of waste and pollution hazards; and

the development of appropriate techniques for the final disposal of dangerous substances contained in waste destined for recovery.