<p>For decades climate scientists have been warning of the dangerous effects of the emission of greenhouse gases into the atmosphere. They have urged a variety of measures that might prevent some of those disasters they claim to foresee. Others deny the reality of human-caused climate change and believe that scientists' warnings about the impact are exaggerated. Speeches are presented from both sides of the issue.</p><p><i>Produced by the Speech Resource Company and fully narrated by Robert Wikstrom</i></p>