With more than 2.1 million people crammed into its 73-sq.-mi. residential areas, Singapore is one of the world's most tightly compacted cities. Singapore Harbor, the world's fourth busiest, is jammed with freighters and oil tankers. Jurong Industrial Estate contains 275 plants that turn out everything from ships to toothbrushes. Another 112 factories are planned or under construction. But despite such dire pollution indicators, Singapore is a breath of fresh air in the miasma of Asian cities, some of which are among the dirtiest on earth.
Cleanliness works in Singapore where it fails elsewhere...
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