Thus,it appears crucial that waste management systems must take due measures to allow for the potentially high growth of such additives. the results and considerations reported above, together with the complex logistics and high cost necessary to collect materials with high interception levels, indicate that levels of source separation and collection as high as 65% could have a limited sustainability. A great innovation and improvement in the recycling technology of each waste fraction(for instance, to obtain an efficient separation of toxic additives) appears to be the real challenge for the near future, with a view to maintaining or, better, to improving the environmental sustainability of recycling.