Do carbon dioxide and methane affect energy ENTERING or EXITING the earth's system?
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Find a formal factor that connects egypt to africa to europe and to southwest asia

Read the article titled "trans-saharan migration routes to north africa and the eu: historical roots and current trends." why do tens of thousands of sub-saharan africans try to cross the mediterranean each year? how are these refugees commonly portrayed? (site 1)

In russia which of these challenges affects the transportation of both petroleum products and other goods?