The pie charts illustrate the amount of energy produced by various energy sources in Scotland for the last year and the last twenty years.
Overall, it is evident that coal, gas and nuclear energies were the leading energy sources for the both pie charts, whereas they experienced a slight decrease in their figures over 20 years. Although other energy sources remained the least utilised energies, they underwent a noticeable increase in usage.
In details, amount of electricity generated by the three leading energy sources 20 years ago (coal, gas, and nuclear) accounted approximately three-quarters of the whole pie chart, while coal was the most popular one, followed by gas and nuclear. Coal comprised almost a half of the chart, while the others were just one-fifth of it.
In the last year, the top list of the most popular energy sources remained the same, however, it underwent some declines in its figures except for nuclear energy. For instance, amount of energy produced by coal and gas decreased by 8.7% and 0.6% respectively, while the nuclear energy source witnessed an increase by 6.8%. Moreover, the least used power sources as hydro pumed storage, oil, hydro natural flow and other renewables increased its contibution to the amount of electicity produced.
In conclusion, it is evident that coal, gas and nuclear remained their dominance over the other power suppliers, but had a decrease in 20 years. Similarly, other power sources experienced an increase in their portions.