Unscientific exploitation of the land creates many problems and may even result in vast areas of desert. Conservation is concerned not only with the preservation of man's heritage of nature but with the best possible use of the world's natural resources in providing food and living space for expanding population.
Introduced by James Cragg, Director of the Nature Conservancy Research Station at Merlewood.
BBC film for Schools
Repeated on Wednesday at 12.0
(to 11.30)