America Debates
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This is a thought - provoking, well - balanced presentation of the debate on global warming. People who hold the view that global warming is a crisis, point to temperature changes in the ocean, raised CO2 levels, and other evidence that directly ties global warming to human industrialization. Critics of this argument point to a natural, cyclical interglacial period occurring, arguing the influence of the earth's orbit and solar output fluctuations. Who is right? Scientists, world leaders, and political leaders weigh in.