Footbridge over traffic on Beijing main street, China

air pollution automobiles backviews bridges buses busy roads capital cities carbon footprint chang an avenue china chinese chinese traffic city life city living congested congestion crossing crossing the road crowded cycle lanes diesel fumes east asia eastern stock image exhaust emissions far east fog foggy footbridge global warming heavy weight of traffic jams major routes overcrowded overcrowding pedestrians peking pollutants polluting environment poor air quality population explosion rush hour rush hour safety slow moving smog smoggy day tail backs tail back traffic conditions traffic jam traffic lanes traffic lights transport transportation urban lifestyle vehicles volume of traffic capitals cars daytime driving full length full lengths growth horizontal journey journeys motorways outdoors outside over populated 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 color image color colour tourism destination