New Delhi, India, March 22, 2007—A woman helps her child drink from a public water tanker in the Indian capital of New Delhi on World Water Day.

The event, which takes place each year on March 22, was established by the United Nations in 1992 to highlight the increasing demands being placed on the world's freshwater supplies.

Addressing this year's theme of "water scarcity," Margaret Chan, head of the World Health Organization, noted that more than 1.6 million people die each year because they lack access to safe water and proper sanitation.

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