Holidaymakers with romany caravan in the country lanes of the Cotswolds, Swinbrook, Oxfordshire, UK

Cyclist on road through the Glen Clunie hills and Grampian Mountains, Scotland, United Kingdom

Rickshaws pass as poor people queue for food in the early morning at Mother Teresa's Mission in Calcutta, India.

Man bowing to Mecca to pray while holding the reins of his camels in Dubai, United Arab Emirates. The old traditional camels contrast with the new modern building construction and cranes.

Eco friendly cycle rickshaw, Zocalo, Plaza de la Constitucion, Mexico City, Mexico, North America

Eco-friendly cycle rickshaws, Zocalo, Plaza de la Constitucion, Mexico City, Mexico, North America

Man cycling along country lane near Coates in Gloucestershire, England

Cargo ship "Wilson Astakos" sailing in front of an offshore wind farm in the oresund outside Copenhagen, Denmark, Europe

Piz Nair cable car station, photovoltaic system, solar cells, high mountains, Switzerland, Europe

Environmentally-friendly hybrid bus, Munich, Bavaria, Germany, Europe

Cargo ship sailing in front of an offshore wind farm in the oresund outside Copenhagen, Denmark, Europe

Piz Nair cable car station, photovoltaic system, solar cells, high mountains, Switzerland, Europe

Villo rental bikes at the Midi train station, Brussels, Belgium, Europe

Villo rental bikes at the Midi train station, Brussels, Belgium, Europe