Recycling-reuse orrecyclewasteor debris.The mostcommonsecondary, tertiary,and so onprocessingin a particularscaleof materials such asglass, paper, aluminum, asphalt, iron, textilesand various types ofplastic.Also,since ancient timesused in agriculture,organic agriculturaland municipal waste.First, the resourcesof many materialsonEarth are limitedand may notbe filledin timecomparableto the lifetime ofthe human civilization.Second, once inthe environment,materials usuallyas contaminants.Third, the wasteand to end itslife-cycleis often (butnot always)a cheaper source ofmany substancesand materials thannaturalsources.