Cyclists and traffic on Beijing main street, Chang An Avenue, China

air pollution automobiles busy roads capital cities carbon emissions carbon footprint chang an avenue china chinese chinese traffic city life city living congested congestion crowded diesel fumes east asia eastern stock image exhaust emissions far east fog foggy global warming heavy weight of traffic jams major routes overcrowded overcrowding pedal power pedalling peking pollutants polluting environment poor air quality population explosion rush hour smog smoggy day tail backs tail back traffic conditions traffic fumes traffic jam traffic lanes transport transportation two wheel vehicles urban lifestyle vehicles volume of traffic bicycle bicycles bike bikes capitals cars city cycling daytime driving full length growth horizontal journey journeys outdoors outside over populated pollution route stock image stock photo stock photograph travel travel photo travel photograph travel photography travel stock travelling travels urban living urban scene vehicle travel destinations travel destination chinese stock image travel experience logistics infrastructure color image color colour tourism destination