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View of a road bursting with vehicles in Harbin city of China ,on World Car Free Day,22 September 2015.The country has launched a long nationwide urban public transport campaign in an attempt to raise awareness of the need to save energy and protect the environment. (Photo by Tao Zhang/NurPhoto) (Photo by NurPhoto/NurPhoto via Getty Images)

View of a road bursting with vehicles in Harbin city of China ,on World Car Free Day,22 September 2015.The country has launched a long nationwide urban public transport campaign in an attempt to raise awareness of the need to save energy and protect the environment. (Photo by Tao Zhang/NurPhoto) (Photo by NurPhoto/NurPhoto via Getty Images)