Does Johannesburg need clean air zones to combat pollution caused by traffic?

An environmental report proposes implementing clean air zones in Johannesburg, where access to certain areas could depend on a vehicle's emissions rating. This measure aims to tackle the city's rising air pollution, largely attributed to traffic. The initiative is part of a broader effort to improve public health and comply with international air quality standards. While this could significantly reduce harmful emissions, it also raises questions about fairness and the practicality of enforcement in a city with diverse traffic patterns and socio-economic factors.