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Two kangaroos duke it out on a suburban street in Australia

Hazy Arizona

The American West faces persistent drought, whether or not relief comes this winter. The population of the Phoenix area (Sun City is pictured here) grew four times larger between 1970 and 2010. The Central Arizona Project, a 336-mile-long system of canals and pipelines, carries Colorado River water through the desert to the Phoenix metro area.

Picture: Peter Essick

Source: National Geographic