The third of five programmes examining environmental issues that have caused widespread concern.
Potentially the most terrifying of all environmental scares, man-made global warming quickly became a political and scientific football, with careers made and broken on it. Politicians were faced with making unpopular decisions on whether or not to force people to change their Iifestyles by cutting down car travel and abandoning fossil fuels. But the science was hotly disputed. Was it the ultimate scare story - or an early warning?
