Rangarira ndima iri pasi apa uye ipapo upindure mubvunzo gare gare mumutauro mumwe chetewo nendima yacho: Ndima: Mukati mema1970, kunzvera kwakaratidzira kuti chlorofluorocarbons (CFCs) dzakagadzirwa nomunhu dzinoderedza ndokutendeutsa mamorekuru eozone mumhepo yakapoteredza pasi. CFCs mamorekuru akatsiga akaumbwa nekabhoni, fluorine, uye chlorine ayo aishandiswa zvikuru muzvigadzirwa zvakadai sefiriji.
1988 Kuwana