21.   Nuclear fission also has its own environmental problems.

22.   Paper production involves a number of chemicals, the disposal of which can cause environmental problems.

23.   Provides an understanding of the theory of natural resource economics and focuses on the application of economic theory and ethical through to current environmental problems.

24.   The solid earth is the source of many natural resources whose extraction can present environmental problems.

25.   ICPIC gives access to details of global environmental legislation including case histories of other companies and the policies they have developed in response to environmental problems.

26.   The report, produced by a working party drawn from all sectors of the tourist industry, predicted that tourist blight would lead to environmental problems.

27.   One of the main functions of the report, however, is to demonstrate the difficulty of acquiring meaningful comparable data on world environmental problems.

28.   The Centre for Social and Economic Research on the Global Environment is to find ways of prioritising environmental problems according to the risks posed to health and welfare.

29.   Among the litany of environmental problems it lists soil degradation, groundwater pollution, low quality of drinking water, deteriorating air quality and deforestation.

30.   Global environmental problems, such as deforestation and ozone depletion, should be tackled through inter-governmental agreements, rather than unilateral action.