Oriri ike nke mmepụta calcium carbide dị oke ibu, yabụ nke a ga-ebute ụfọdụ ihe ịma aka na ọkụ ọkụ China. Ebe ọ bụ na a na-emepụta ọkụ eletrik site na coal na-ere ọkụ, ọ dị mkpa ka ọ na-eri ọtụtụ coal, n'ihi ya, ọkụ ọkụ ga-emetọ ikuku. Otú ọ dị, China emewo mgbanwe ụfọdụ na atumatu kemgbe ọtụtụ afọ. China na-emelite yinye ụlọ ọrụ ya mgbe niile. Ugbu a, anyị nwere ike ịhụ na China ebubatala ọtụtụ mmanụ, a na-agbakwa ụlọ ọrụ obodo ume ibubata mmanụ iji nụchaa ngwaahịa ndị dị n'okpuru. Ya mere, n'ime afọ ndị na-adịbeghị anya, agbakwunyere ọtụtụ ndị na-emepụta usoro ethylene ọhụrụ na China, na ikike mmepụta PVC ọhụrụ na China n'afọ ndị na-adịbeghị anya bụ ikike mmepụta nke usoro ethylene. Ike mmepụta nke usoro calcium carbide nke China akwụsịla nkwado ọhụrụ. Ya mere, n'ọdịnihu dị nso, ọnụ ọgụgụ nke ethylene osisi na China ga-anọgide na-abawanye na calcium carbide usoro ga-anọgide na-ebelata. N'ọdịnihu, olu nke ethylene na-ebupụ na China ga-anọgide na-abawanye, ma jiri nwayọọ nwayọọ ghọọ onye na-ebupụ ụwa nke ethylene usoro PVC.
