Four major cities to ban use of diesel vehicles in bid to improve air quality

The leaders of four major cities have said they will ban the use of all diesel- powered cars and trucks by the middle of the next decade in a bid to improve air quality.

The mayors of Paris, Mexico City, Madrid, and Athens also said they will give incentives for alternative vehicle use and promote walking and cycling in their cities.

The commitments were made in Mexico at a biennial C40 meeting of city leaders, a network of cities that are committed to addressing climate change.