Abstract
The increased awareness of the need to preserve and improve the natural and social environment has given rise to many studies and international conferences. Coast cities are especially vulnerable, since many have to cope with industrial and other pollution from inland as well as their own (which may include smog, e.g. Los Angeles), while their tourism depends on the attractiveness of their beaches (which may be restricted in length and area), water quality etc. Their urban and tourism development may have detracted from their attractiveness. Tourism movement to, in and from them may be highly seasonal, causing congestion and accidents, and entailing the building of accommodation and other services for peak demand. Many once popular resorts have lost much of their past tourism. The urban coastal population is over 800 million, and is forecasted to reach one billion about the year 2000, about 16% of the world's population: over 6 million tons of litter reach the sea each year [Time Magazine June 1, 1992 — based on UNEP and World Resources Inc.].
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