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…
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