High density roof top view of buildings crowded together in the city centre of Faro, Algarve, Portugal, Europe

Ho Chi Minh city (Saigon) skyline with colorful house, Ho Chi Minh City, Vietnam

Monster Buildings illuminated at night, Quarry Bay, Hong Kong, China

New town built to re-home Chinese communities as part of Three Gorges dam project, Yangze River, China

Victoria Line cruise ship by new town built to re-home communities as part of Three Gorges dam project, China

A lone, young man walks along a long, empty, prairie, dirt road found along the foothills that border the Rocky mountains in southern Alberta during October of 2005. Much of this area of low population density, large ranches and farms nestled at the base of the southern Rocky mountains is changing hands to concentrations of people in tight and clustered housing with paved roads.