Air pollution in the world's megacities. (includes related articles on:Beijing, China; Los Angeles, California; Mexico City, Mexico; India; Cairo, Egypt; Sao Paulo, Brazil; and Tokyo, Japan)

From: Environment | Date: March 1, 1994 | Copyright information

A report from the United Nations Environment Programme and the World Health Organization

The Global Environment Monitoring System (GEMS) operates worldwide networks to monitor both air and water quality under the auspices of the World Health Organization (WHO) and the United Nations Environment Programme (UNEP). Since 1974, WHO and UNEP have collaborated on the operation of that portion of GEMS called GEMS/Air, which monitors air quality in urban areas. The coordination...

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