During the sixth biennial C40 Mayors Summit held in Mexico City, mayors from Paris, Mexico City, Madrid, and Athens said that they will ban diesel vehicles from their cities' roads by 2025 in a commitment to reduce urban air pollution. C40 is a network of the world’s megacities established to address climate change.

C40 is a network of the world’s megacities established to address climate change.C40 is a network of the world’s megacities established to address climate change.The initiative will include policies to incentivize alternative vehicles and promote walking and cycling infrastructure, and a global petition demanding that vehicle manufacturers lead an air quality transformation. The latter urges companies to stop producing diesel vehicles by 2025 and to support a transition to electric, hydrogen, and hybrid vehicles.

Pursuing policies that improve air quality – decarbonizing transportation systems and promoting alternative transportation options – also help cities deliver on the ambition of the Paris Agreement, the mayors say. C40 announced a two-year partnership with Johnson & Johnson to promote the health and well-being of urban inhabitants and the environment through research and education.

The organization is also partnering with the World Health Organization and UN Environment’s Climate and Clean Air Coalition, in support of the BreathLife campaign to halve the 6.5 million deaths from air pollution by 2030.

The campaign will support city governments to reduce harmful emissions from the transport, waste, and energy sectors, as well as mobilizing citizen action to reduce air pollution while also slowing climate change.

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