Kemịkal na poliplastik, kemịkal ụlọ, gluu
Nkeji n’ime kemịkalụ na poliplastik N’oge gara aga, e ji kemịstrị were ya dị ka »anwansi ojii«, ebe taa anyị na-ezute ya n’ụzọ ọ bụla, ọbụna n’ụlọ. Anyị maara na site na »Crni bik« ma ọ bụ ndị ọzọ detergents anyị nwere ike ịsa uwe mfe. Ọtụtụ ndị maara na tetraethyllead na-eme ka nọmba octane bawanye…
Gụọ akụkọ ahụ