The two pie charts illustrate the sources of energy consumed by Australians in 2008 and the predictions for 2030.
Overall, it can be observed that coal was the most widely used energy source in 2008, but it is expected to become less efficient over the next 22 years. In contrast, oil is projected to account for the highest proportion of energy consumption in 2030. Although solar energy had not been widely adopted in 2008, it is anticipated that geothermal power will replace it by 2030.
In 2008, the three largest sources of energy were coal, oil, and gas, with percentages of 39%, 32%, and 22.9%, respectively. In contrast, the percentage of gas is expected to rise to 32%, while the utilization of coal will decrease to 27%. Furthermore, oil is predicted to be replaced by coal as the most efficient energy source by 2030.
By 2030, the use of wind and hydro systems is expected to see a slight increase, rising from 0.30% to 0.90% and from 0.20% to 0.70%, respectively. The total amount of solar energy used in 2008 was 1.3%, but this is projected to experience a significant rise by 2030.
Finally, geothermal energy was not part of the various power sources in 2008; however, by 2030, it is expected to substitute the use of solar energy, starting with a projected percentage of 4.3%.