The main point of paragraph 4 is to describe _____. A. the causes and projected effects of global warming B. global warming C. the effects of global warming D. the causes and effects of globa

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Causes: … the burning of large amounts of fossil fuels, such as coal and oil, which release gases that trap heal in the atmosphere.

Effects: World temperatures already have increased this century by about 6 degrees Celsius and are projected to rise by between 1.6 degrees and 3.8 degrees by 2100.