Rangarira ndima iri pasi apa uye ipapo pindura mubvunzo gare gare mumutauro mumwe chetewo sechikamu:  Kupfuura: Kufamba kwakawanda uye kuwanda kwemigwagwa mumaguta makuru kunoramba kuchikonzera zvinetso zvakakomba zvezvakatipoteredza uye zvehutano, kunyange zvazvo mazinga eutsi akaderera zvikuru kubvira kuma1970 nema1980, uye kuvapo kweutsi kuri kuramba kuchiwedzera uye mazinga esulphur dioxide ari kuderera.  Mubvunzo: Ndechipi chiri chikonzero chikuru chezvinetso zvemhoteredzo noutano muchiitiko chino?
Motokari dzakawanda uye kuwanda kwemotokari