World Environment 1989 Issue 4 Environmental Pollution:A Long-term Perspective

Environmental Pollution:A Long-term Perspective
James Gustave Speth President;World Resources Institute.U.S.A

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Recent Trend of International Environmental Conferences
Shinjiro Tsuge Pollution Control Section;Pollution Dept.;Ministry of Trade and Industry;Japan

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The Global Issue of Air Pollution
Hikali Kobayasi Assistant Chief;Planning Section;Air Protection Dept.;Environmental Protection Agency;Japan

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Anaerobic Wastewater Treatment in the Philippine Sugar Industry
J.G.Bruins Waste reduction program and assessment of current status for Illinois;USA

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Characterization and Environmental Effects of Sludges Produced by Metallurgical Factory
J.R.Dobosz & M.Sebastian Institute of Environment Protection Engineering;Technical University of Wroclaw;POLAND

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Overall Risk Analysis of Pollution in Hazardous Waste Disposal and Dumping Sites
Thomas Shen Wang Shaoquan Senior Researcher Environmental Protection Department;New York State;USA Deputy Section Chief Environmental Protection Department;Qingdao;China

..............page:40-43

Cleaning Up:U.S.Waste Management Technology and Third World Development
John Elkington &.Jonathan Shopley World Resources Institute;1709 New York Avenue;N.W.Washington;D.C.20006;U.S.A.

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mei guo huan bao ji shu ping jia
zhang kun min ;

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High-speed Filtration Equipment
qi yan ;

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