Answer: The two given pie charts illustrate the percentage of generation of energy, which was produced from various sources in a particular country throughout the period from 1985 to 2003.
Overall, it is clear from the graph that the maximum proportion of energy was produced from oil and the least from hydrogen and the other renewable sources.
As can be clearly seen from the graph, the rate of oil was 52% in terms of producing energy by 1985, which was the major source of power. But, all of a sudden, this figure dropped from just over a half (52%) in 1985 to about two fifth (29). The nuclear energy, which was the second largest source of energy in 1985 and that was 22%. In 2003, this number witnessed a slight decrease and reached just under a fifth (17%).
On the other hand, the use of natural gas, coal and other renewable energy demonstrated an upward trend, that was increased from 13 %, 8% and 1 percent in 1985 to 23%, 13% and 4 percent in 2003, respectively. By contrast, astonishingly, the proportion of energy produced from hydrogen remains unchanged over the given period.