AdvertisementIn Madrid, A Plan To Fight Pollution By Shifting Away From Diesel-Run CarsApril 06, 2017Lauren FrayerfacebookEmailIn three years, Madrid's Gran Via will be off-limits to private cars as part of Mayor Manuela Carmena's plan to cut air pollution. Only public buses, taxis, cyclists and pedestrians will be allowed. By 2025, diesel-powered vehicles will be banned citywide. (AFP/Getty Images)