The pie charts represent how many units of electicity were produced by five different fuel sources in Australia and France in 1980 and 2000.
Overall, there was a significant difference between the usage of coal and other sources of fuel. Initially, coal and nuclear power were responsible for the largest contribution to the electricity generation, while hydro power and natural gas ranked last.
It can be observed that in Australia, in 1980, the production of electricity through the usage of coal was as high as from other fuel sources together. The contribution of natural gas was as significant as from nuclear power, and oil was the least used source of fuel. However, after the twenty-year period, total production had increased from 100 to 170 units. The usage of oil and natural gas had become ten times smaller, whereas coal contribution soared dramatically to 130 units.
In contrast, in France, coal and natural gas had initially become the most common sources of fuel, and together were responsible for a half of total production. In comparison with coal and natural gas, the contribution of oil was lower by a margin of five units. The usage of nuclear power was three times as high as that of hydro power. In 2000, nearly three of four units were produced through the use of nuclear power. Approximately a quarter of total manufacturing was allocated to coal and oil, while natural gas and hydro power contributed a narrow margin.