2 report(s) found.
Two pie chart compare some major sources including oil, natural gas, coal, hydroelectric power and nuclear power to provide for mechanical engineering in USA in the 1980s and 1990s. As can be seen, oil accounted for a highest proportion in 1980 and 1990. In contrast, hydroelectric power and nuclear power represented for a small part […]
The two pie charts illustrate, several main sources of energy in America in the 1980s and the 1990s. Overall, oil was the most dominant among all other categories in both years. Only one category remained constant called “hydroelectric power” while, some changes occurred in the others. In 1980 oil was the most popular source of […]