Kuzo zonke izinto zehlabathi, yiyiphi eya “kuphelelwa” kuqala? Okukhona sisebenzisa ngakumbi njengoluntu, kokukhona sisiva malunga nendlela intsimbi ekrwada kunye neeminerali ezincipha ngayo, ngoko kubonakala kusengqiqweni ukucinga ukuba ezimbalwa zisenokunyamalala.
Xa sijonga phambili kwixesha elizayo, eminye imithombo ithi izinto ezifana neprofayili ye-aluminium extrusion zisenokuphela emva kweminyaka engama-80. Ukulinganisela kokubonelela kunye nemfuno kuyasichaphazela, ingakumbi xa kufikwa kwixabiso kunye nokufumaneka kobuchwepheshe ebomini bethu. Ngoko ke nangona kungekho zinto zinqongophele kangangokuba sele ziza kuphela - kufuneka sikhathazeke kukuba ezininzi zisenokungafikeleli kuthi kungekudala.
