Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Kupfuura: Mukati memakore a1970, nzvero yakaratidza kuti chlorofluorocarbons (CFCs) dzakagadzirwa nomunhu dzinoderedza ndokutendeutsa mamorekuru eozone ari mumhepo yakapoteredza pasi. CFCs mamorekuru akatsiga akaumbwa nekabhoni, fluorine, uye chlorine ayo aishandiswa zvikuru muzvigadzirwa zvakadai semafiriji. Kutyisidzira kunobatanidzwa nokuderedzwa kweozone kwakasundira nhau yacho pamberi penhau dzomugariro wokunze wenyika yose ndokuwana kusimudzirwa kupfurikidza nemasangano akadai seWorld Meteorological Organization neUnited Nations. Chibvumirano cheVienna chakagamuchirwa paMusangano weVienna wa1985 uye chakatanga kushanda muna 1988. Chibvumirano cheVienna chakagovera hurongwa hunodiwa kuti hugadzire matanho anorayira muchimiro cheMontreal Protocol.  Mubvunzo: Chibvumirano cheVienna chakamanikidzwa rini?
1988 Kuwana