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[00:00.00]More and more of the world's population are living in towns or cities.
[00:05.13]The speed at which cities are growing in the less developed countries is alarming.
[00:11.36]Between 1920 and 1960,big cities in developed contries increased two and a half times in size,
[00:20.15]but in other parts of the world the growth was eight times their size.
[00:25.45]The sheer size of growth is bad enough,
[00:29.76]but there are now also very disturbing signs of trouble in the comparison of percentages of people living in towns and percentage of people working in industry.
[00:41.62]During the 19th century,cities grew as a result of the growth of industry.
[00:48.57]In Europe,the proportion of people living in cities was always smaller than that of the workforce working in factories.