Abstract
Over the past five years there has been a renewed concern over the condition of the atmosphere and the global impact of air pollution. This concern has largely been sparked by the discovery of the ozone in the stratosphere, and the rediscovery of greenhouse warming_ The ozone hole was first discovered in 1985, and conclusive proof of its association with chlorofluorocarb ons (CFCs) was found in 1987. This was followed by estimates that the average thickness of the ozone layer in the northern mid-latitudes had decreased during the 1980s by as much as 5% (I, 2). The greenhouse effect is hardly a new discovery; the chemist Arrhenius suggested 100 years ago that increased carbon dioxide from fossil fuels could lead to increased greenhouse warming. However, the accelerated increase in atmospheric carbon dioxide and methane observed during the
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