Mumwe wevanotungamira pasi rose vatengesi vemhando yepamusoro uye yepamusoro-soro kabhoni dema nguva pfupi yadarika vakazivisa kuti vari kuronga kukwidza mitengo yezvinhu zvese zvekabhoni nhema zvakagadzirwa kuNorth America munaGunyana uno.

Kuwedzera uku kunokonzerwa nemitengo yakakwira yekushandisa ine chekuita neachangobva kuiswa emission control masisitimu uye inodyidzana mari yekudyara inodiwa kuchengetedza masevhisi.Pamusoro pezvo, mari dzesevhisi, matemi ekubhadhara uye kudzoserwa kwevhoriyamu zvichagadziriswa kuratidza mutengo wepamusoro wekutakura zvinhu, zvisungo zvemari uye zvinotarisirwa zvinovimbika.

Kuwedzera kwemutengo kwakadai kunotarisirwa kuwedzera kuchengetedzeka uye kusimba mumatanho ekugadzira kabhoni.