ifting ▁to ▁countries ▁in ▁sout heast ▁Asia . ▁The ▁crisis ▁generated ▁significant ▁concern ▁about ▁the ▁practices ▁and ▁environmental ▁sust ain ability ▁of ▁the ▁rec y cling ▁industry . ▁The ▁ab rupt ▁shift ▁caused ▁countries ▁to ▁accept ▁more ▁rec y cl able ▁materials ▁than ▁they ▁could ▁process , ▁raising ▁fundamental ▁questions ▁about ▁sh ipping ▁rec y cling ▁waste ▁from ▁econom ically ▁developed ▁countries ▁to ▁countries ▁with ▁few ▁environmental ▁reg ulations — a ▁practice ▁that ▁pred ated ▁the ▁crisis . ▁ ▁Legisl ation ▁ ▁Supp ly ▁▁ ▁For ▁a ▁rec y cling ▁program ▁to ▁work , ▁having ▁a ▁large , ▁stable ▁supply ▁of ▁rec y cl able ▁material ▁is ▁cru cial . ▁Three ▁legisl ative ▁options ▁have ▁been ▁used ▁to ▁create ▁such ▁a ▁supply : ▁mand atory ▁rec y cling ▁collection , ▁container ▁depos it ▁legisl ation , ▁and ▁refuse ▁b ans . ▁Mand atory ▁collection ▁laws ▁set ▁rec y cling ▁targets ▁for ▁cities ▁to ▁aim ▁for , ▁usually ▁in ▁the ▁form ▁that ▁a ▁certain ▁percentage ▁of ▁a ▁material ▁must ▁be ▁di vert ed ▁from ▁the ▁city ' s ▁waste ▁stream ▁by ▁a ▁target ▁date . ▁The ▁city ▁is ▁then ▁responsible ▁for ▁working ▁to ▁meet ▁this ▁target . ▁ ▁Container ▁depos it ▁legisl ation ▁involves ▁offering ▁a ▁ref und ▁for ▁the ▁return ▁of ▁certain ▁containers , ▁typically ▁glass , ▁pl astic , ▁and ▁metal . ▁When ▁a ▁product ▁in ▁such ▁a ▁container ▁is ▁purchased , ▁a ▁small ▁sur charge ▁is ▁added ▁to ▁the ▁price . ▁This ▁sur charge ▁can ▁be ▁rec laimed ▁by ▁the ▁consumer