Izinzwa zokucindezela ziyizingxenye ezibalulekile ezimbonini ezihlukahlukene, okuhlanganisa ukongiwa kwamanzi, ezokuthutha, ukwakhiwa okuhlakaniphile, ukulawula ukukhiqiza, amakhemikhali e-petrochemicals, imithombo kawoyela, ukukhiqizwa kukagesi namapayipi. Lezi zinzwa zikala...
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