Kule minyaka ingama-20 izayo, siya kuqhubeka ukuthatha uthumo lokuhamba ngokuhambelana nobuchwepheshe bamva nje, sibonelela ngeemveliso ezithembekileyo, senze uphando ekuphononongeni isicelo se-ozone kunye nokwandisa uluhlu lwemveliso ye-ozone ye-BNP ukwenzela izicelo ezibanzi.