This document discusses global warming from multiple perspectives. It first explains how the debate on global warming emerged in the 1980s and has since involved many scientific and social science disciplines. It then summarizes the views of two authors - Robert Strom and Roy Spencer - who have opposing views on global warming. Strom explains the natural cycles of warming and cooling throughout Earth's history but acknowledges that human activity since the Industrial Revolution has likely caused recent temperature increases by emitting greenhouse gases. Spencer argues that climate change hysteria has been fueled by politics and economic motives rather than science. The document concludes that since humans are part of nature, whatever causes the planet to warm can be considered natural, not artificial.