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The Pie charts illustrate energy production from different sources for the USA in two different years 1980 and 1990 The Pie charts illustrate energy production from different sources for the USA in two different years 1980 and 1990
Overall, the main source of energy in the year 1980 is oil, likewise, it remained on top exceptionally in the year 1990. Coal consumption stood constant in both the years and also natu...