Mayor of Oslo Marianne Borgen cites improving air quality as a major reason for the measures, which are also expected to help the city halve its carbon dioxide emissions by 2020 on 1990 levels.
Meya wa Oslo Marianne Borgen anataja uboreshaji wa hali ya hewa kama sababu kuu ya hatua hizo, ambazo pia zinatarajiwa kusaidia jiji hilo kupunguza kwa nusu uzalishaji wake wa kaboni dioksidi ifikapo 2020 katika viwango vya 1990.