Ngenkathi iChina iqhubeka ukulwa nokunciphisa ukungcola emadolobheni athile, inenye inkinga enkulu futhi lokhu ucasha ku-80% wamanzi emithonjeni yemvelo esetshenziswa amapulazi, amafemu nezindlu emathafeni anabantu abaningi.
Lokhu kukufeza lokho ayikwazi ukusetshenziselwa ukuphuza noma ukugeza ngenxa yokungcola okuphezulu okubangelwa izimboni nezolimo, ngokusho kwedatha entsha enikezwe abezindaba baseChina ngoMsombuluko odlule. Inobukhulu obukhulu kangangoba idale i-alamu entsha futhi enkulu mayelana nokungcola ezweni elinenani elikhulu kakhulu lezakhamizi emhlabeni.
Ngemuva kweminyaka ku gxila kulezo zibhakabhaka ezimpunga, idatha entsha ivela emithonjeni engu-2.103 etholakala eChina futhi ishaya ngamandla izakhamizi zaseChina esezivele zithintwe yilokho kungcoliswa komoya. Kunamadolobha amaningi nemizana ethembele kule mithombo ukuze bakwazi ukwenza imisebenzi yabo yansuku zonke.
UDabo Guan, uprofesa wase-University of East Anglia obefunda ukungcoliswa kwamanzi eChina, uthi: «ngokombono wami, lokhu kukhombisa ukuthi kanjani amanzi yinkinga enkulu kakhulu kwemvelo eChina. Abantu emadolobheni babona ukungcola emoyeni nsuku zonke, ngakho-ke ingcindezi enkulu idalwa ivela emphakathini. Kepha emadolobheni, abakwazi ukubona ukuthi ukungcola kwamanzi kubi kangakanani. Azinencazelo efanayo".
Ucwaningo olusha olushicilelwe luthole lokho Amaphesenti angama-32,9 emithombo evivinywayo ezindaweni ezisenyakatho nasenkabeni yeChina babenezinga lamanzi ebangeni lesi-4, okusho ukuthi lisetshenziselwa imboni kuphela. Amaphesenti angama-47,3 wemithombo anezinga elibi kakhulu, amahlanu. Okungcolisayo okutholakele kufaka phakathi i-manganese, i-fluoride, ne-triazoles, iqoqo lezinto ezisetshenziswa kuma-fungicides.
UGuan uphetha ngani ukungcola okusindayo Okokuhlinzekwa okuseduze kwendawo kwaphoqa amadolobha amaningi ukuthi embe izinkulungwane zamamitha ngaphansi komhlaba ukuthola amanzi ahlanzekile, futhi lokho bekumisa amandla aleyo mifula ejulile.