ates ▁is ▁recognized ▁as ▁one ▁of ▁the ▁principal ▁challeng es ▁that ▁needs ▁to ▁be ▁addressed ▁for ▁the ▁success ▁of ▁a ▁long - term ▁vision ▁of ▁a ▁green ▁economy ▁and ▁ach ieving ▁zero ▁waste . ▁Rec y cl ate ▁quality ▁is ▁generally ▁referring ▁to ▁how ▁much ▁of ▁the ▁raw ▁material ▁is ▁made ▁up ▁of ▁target ▁material ▁compared ▁to ▁the ▁amount ▁of ▁non - target ▁material ▁and ▁other ▁non - re cy cl able ▁material . ▁For ▁example , ▁steel ▁and ▁metal ▁are ▁materials ▁with ▁a ▁higher ▁rec y cl ate ▁quality . ▁It ' s ▁estimated ▁that ▁two - third s ▁of ▁all ▁new ▁steel ▁manufact ured ▁comes ▁from ▁rec yc led ▁steel . ▁Only ▁target ▁material ▁is ▁likely ▁to ▁be ▁rec yc led , ▁so ▁a ▁higher ▁amount ▁of ▁non - target ▁and ▁non - re cy cl able ▁material ▁will ▁reduce ▁the ▁quantity ▁of ▁rec y cling ▁product . ▁A ▁high ▁proportion ▁of ▁non - target ▁and ▁non - re cy cl able ▁material ▁can ▁make ▁it ▁more ▁difficult ▁for ▁re - process ors ▁to ▁achieve ▁" high - quality " ▁rec y cling . ▁If ▁the ▁rec y cl ate ▁is ▁of ▁poor ▁quality , ▁it ▁is ▁more ▁likely ▁to ▁end ▁up ▁being ▁down - cyc led ▁or , ▁in ▁more ▁extreme ▁cases , ▁sent ▁to ▁other ▁recovery ▁options ▁or ▁land filled . ▁For ▁example , ▁to ▁facil itate ▁the ▁re - man ufact uring ▁of ▁clear ▁glass ▁products ▁there ▁are ▁tight ▁restrictions ▁for ▁colored ▁glass ▁going ▁into ▁the ▁re -