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The C40 Mayors Summit has just finished in Mexico City and incoming Chair of the C40, Mayor of Paris Anne Hildalgo has announced a remarkable policy-four world cities, all known for their sometimes questionable air quality have committed to banning  all diesel vehicles in their municipalities by 2025. Following Tokyo’s lead the mayors of Paris, Mexico City, Madrid and Athens stated that they would promote walking and biking, and incentivize the use of  other technologies in vehicles.

In Europe where gasoline is expensive, diesel can be a more cost-effective alternative for running vehicles. But with the World Health Organization attributing three million deaths a year to outdoor pollution exposure,  diesel engines have been pinpointed as a particular problem.

As the BBC notes: “Diesel engines contribute to the problem in two key ways – through the production of particulate matter (PM) and nitrogen oxides (NOx). Very fine soot PM can penetrate the lungs and can contribute to cardiovascular illness and death. Nitrogen oxides can help form ground level ozone and this can exacerbate breathing difficulties, even for people without a history of respiratory problems”.

These types of changes will mean that car makers will need to adapt to new regulations, and look for alternative ways to power vehicles. The Mayor of London Sadiq Khan is considering expanding an innovative Ultra-Low Emission Zone in London’s centre. And the Mayor of Mexico City states:: It is no secret that in Mexico City, we grapple with the twin problems of air pollution and traffic”.

The banning of diesel vehicles and the promotion of active transportation and connected transit routes promises to rewrite what a legible city looks and feels like. Paris has already undertaken a regulatory ban on vehicles registered before 1997 from even entering the city,  and has embraced the closing of the Champs-Elysee to vehicular traffic one day a month.  Price Tags has also written about  a three kilometer section of the right bank of the Seine, once a throughway for motor cars becoming a walkers’ paradise, despite the fury of commuting traffic.

Eliminating diesel engine use is a direct approach to addressing the health of the city. Will Metro Vancouver follow?

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