| http://www.w3.org/ns/prov#value | - During World War I, Milutin Milankovitch, a Serbian mathematician, worked out how these changes help account for the Earth's pattern of ice ages and warm periods. (We are in a warm period now.) If you go to the USATODAY.com Resources: Climate change science page and scroll down to the ribbon that reads Factors other than greenhouse gases that affect climate you will find links to more on Earth's or
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