Uzomangala ukuthi izikhwama zikadoti zisetshenziswa kabanzi emhlabeni wonke futhi azintsha.Izikhwama zepulasitiki eziluhlaza ozibona nsuku zonke zenziwe nge-polyethylene.Zenziwa ngo-1950 nguHarry Washrik nozakwabo, uLarry Hansen.Bobabili abasunguli bavela eCanada.
Kwenzekani ngaphambi kwesikhwama sikadoti?
Ngaphambi kokuba izikhwama zikadoti zisakazwe, abantu abaningi bebengcwaba udoti esigcawini.Abanye abantu bashisa udoti.Ngokushesha ngemva kwalokho, baqaphela ukuthi ukushiswa nokungcwaba kwakuyingozi emvelweni.Izikhwama zikadoti zisiza abantu ukuthi babhekane kangcono nodoti.
Izikhwama zikadoti zakuqala
Ekuqaleni, izikhwama zikadoti zazisetshenziselwa ukuthengisa.Aqale asetshenziswa esibhedlela saseWinnipeg.U-Hansen wasebenzela i-union carbide, eyathenga into esunguliwe kubo.Le nkampani yenza izikhwama zikadoti zokuqala eziluhlaza ngeminyaka yawo-1960 futhi yazibiza ngezikhwama zikadoti zasendlini.
Ukusungulwa ngokushesha kwabangela umuzwa futhi kwasetshenziswa amabhizinisi amaningana nemindeni.Ekugcineni, yaba umkhiqizo odumile.
Isikhwama sokudonsa
Ngo-1984, umlando wezikhwama zikadoti wangena emakethe, okwenza kube lula ukuthi abantu baphathe izikhwama ezigcwele.I-drawstring yasekuqaleni yenziwe ngepulasitiki ephezulu.Lezi zikhwama ziqinile futhi zinendlela eqinile yokuvala.Kodwa lezi zikhwama zibiza kakhulu.Izikhwama ze-drawstring zidumile ekhaya futhi kulula ukuzithwala, ngakho ngizithenge ngemali eyengeziwe.
Ubungane bemvelo bezikhwama zikadoti ze-polyethylene buyimpikiswano.Ngo-1971, uDkt. James Gillett waklama ipulasitiki ephuka elangeni.Ngokusungulwa, singasebenzisa izikhwama zepulasitiki futhi siqhubeke simile ohlangothini lokuvikelwa kwemvelo.Izikhwama ze-biodegradable sezivele zikhona emakethe kulezi zinsuku futhi zisetshenziswa abantu abaningi.
Isikhathi sokuthumela: Apr-16-2021