Morning rush hour and pollution traffic fumes, Mumbai (Bombay), India, South Asia

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

Biker in front of heavy traffic in Trafalgar Square, downtown London city centre, England, United Kingdom

Car transporter lorries travelling among congested traffic on M1 motorway in Hertfordshire, United Kingdom

Heavy weight of traffic travelling on M1 motorway in Hertfordshire, United Kingdom

Public transport buses travel in heavy traffic in Trafalgar Square, London city centre, England, United Kingdom

Royal Mail lorry travelling slowly among heavily congested traffic on M1 motorway in Hertfordshire, United Kingdom

Volume of traffic travelling on freeway lanes, outskirts of Washington DC, USA

Congested traffic travelling on M1 motorway in Hertfordshire, United Kingdom

Traffic on M11 Motorway near Harlow, Essex, United Kingdom

Traffic, Bangkok, Thailand

Traffic on M1 motorway in Hertfordshire, United Kingdom

Heavy traffic at a standstill at traffic lights in Trafalgar Square, London city centre, England, United Kingdom

Traffic on freeway, outskirts of Washington DC, USA

Heavy weight of traffic travelling on freeway lanes, outskirts of Washington DC, USA

Rush hour traffic on the M60 motorway near Manchester, England, United Kingdom, Europe

Rush hour traffic on the M60 motorway near Manchester, England, United Kingdom, Europe

Rush hour traffic on the M60 motorway near Manchester, England, United Kingdom, Europe

Cars in late winter snowfall in Harbin, Heilongjiang province, China, Asia

Traffic Shanghai, bicyclist, breathing mask, face-mask, elevated motorway, junction

A3 Autobahn (motorway) near Oberhausen-Holten at sunset, OXEA Ruhrchemie chemical plant in background, Oberhausen, North Rhine-Westphalia, Germany, Europe

Sign, particulate filer, For the sake of the environment, this vehicle is equipped with a particle filter

Low Emission Zone information sign at B224, Gladbecker Street, Bottrop, Essen city limits, North Rhine-Westphalia, Germany, Europe

Braunkohlekraftwerk Neurath, lignite-fired power plant, Grevenbroich, North Rhine-Westphalia, Germany, Europe

Stop sign, cooling towers of Braunkohlekraftwerk Neurath, lignite-fired power plant, Grevenbroich, North Rhine-Westphalia, Germany, Europe

Steam train of the Swabian Forest Railway, Rudersberg, Baden-Wuerttemberg, Germany, Europe

Steam Locomotive Festival, Railway Museum, Dahlhausen, Bochum, North Rhine-Westphalia, Germany, Europe

Loading bridges with containers and ships in the container terminal Mainz am Rhein, Mainz, Rhineland-Palatinate, Germany, Europe

Aerial view, construction site, bulk ships, unloading of coal, ThyssenKrupp Steel, port Walsum, Duisburg, Ruhrgebiet region, North Rhine-Westphalia, Germany, Europe

Two burning trucks, including a tanker with heating oil, fatal accident on the A8 motorway, Stuttgart, Baden-Wuerttemberg, Germany, Europe

Nostalgic steam train as a tourist attraction, Zillertalbahn, regional train, Tyrol, Austria, Europe

Steam Locomotive Festival, Railway Museum, Dahlhausen, Bochum, North Rhine-Westphalia, Germany, Europe

Steam locomotive in Wernigerode, Saxony-Anhalt, Germany, Europe

Jeepney taxi with smoke, Manila, Philippines, Southeast Asia

Steam Locomotive Festival, Railway Museum, Dahlhausen, Bochum, North Rhine-Westphalia, Germany, Europe

Steam Locomotive Festival, Railway Museum, Dahlhausen, Bochum, North Rhine-Westphalia, Germany, Europe

Nostalgic steam train as a tourist attraction, Zillertalbahn, regional train, Tyrol, Austria, Europe

Steam Locomotive Festival, Railway Museum, Dahlhausen, Bochum, North Rhine-Westphalia, Germany, Europe

INDIA Karnataka Bangalore Heavy traffic on Mahatma Gandhi MG Road. India Busy Bangalore Travel Asia Sub-Continent Karnataka Urban Pollution Mahatma Gandhi Traffic Exhaust Fumes Chaos Street Crowded Asian Bharat Inde Indian Intiya Ecology Entorno Environmental Environnement Gray Green Issues Grey