The three pie charts illustrate the proportion of energy produced from different categories in a European nation between 1990 and 2020, and the predictions for 2040.
Overall, it is evident that while coal and nuclear witnessed downward trends over the 30-year period, the reverse patterns were true for gas, renewables, and other sources. Additionally, coal, gas, and nuclear are predicted to decline in the next 20 years, whereas the remaining cohorts are forecasted to grow and remain stable.
In 1990, energy generated from coal ranked first with 42%, followed by 25% of gas. In addition, nuclear accounted for 15%, which was 5% higher than renewables. Other sources only occupied 8% in that year. 30 years later, a significant drop was observed in the rate of coal, recording at 28%. Also, the figure for nuclear decreased minimally to 12%. By contrast, gas rose to 30% in 2020, followed by 20% of renewables. Other categories went up slightly to 10%.
In 2040, noticeable declines are estimated to be seen in the percentages of coal, gas, and nuclear, accounting for 18%, 22%, and 10% respectively. Meanwhile the proportion of renewables is predicted to go up considerably to 40%. Other sources are projected to be unchanged.