Ngeziqinisekiso ezingaphezu kweminyaka engama-20, sikholelwa ekunikezeni izinsizakalo zamakhemikhali ezisezingeni eliphezulu. Ukuzibophezela kwethu ekwakheni nasekuthuthukiseni kuqinisekisa ukuthi sihlangabezana nezidingo ezihlukahlukene zamakhasimende ethu emikhakheni ehlukene. Thembela kithi ukuze uthole izixazululo zamakhemikhali ezithembekile nezisebenzayo.