City air quality trends
Subtitle: (GEMS/Air data).
Contributors: GEMS/AIR (Programme); United Nations Environment Programme.; World Health Organization.; Earthwatch (Organization); Global Environmental Monitoring System.
Publisher: United Nations Environment Programme; World Health Organization; United Nations Environment Programme, Global Environment Monitoring System Programme Activity Centre [distributor]; World Health Organization, Prevention of Environmental Pollution [distributor]
Published: 1992
Place of publication: Nairobi; Geneva, Switzerland
Language: eng
Subjects: Air quality -- Charts, diagrams, etc.; Urban climatology -- Charts, diagrams, etc.
Notes: At head of title: Earthwatch, Global Environment Monitoring System.
"WHO/PEP 92.1; UNEP/GEMS 92.A.4"--P. [2] of cover.
Table of contents: title: v. 1. Bangkok, Beijing, Bombay, London, Sao Paulo, Shanghai, Tehran, Tokyo, Wroclaw, Zagreb