The line graph presented illustrates the proportion of electricity produced from six different energy sources in Country X from 1990 to 2025. These sources include natural gas, nuclear, hydroelectric, wind power, and solar power.
Overall, coal was the largest source of electricity generation during this time period. However, the use of natural gas increased dramatically and eventually surpassed coal by the end of the period.
In the early years, coal was the primary energy source for electricity generation. Its use peaked in 2000 at nearly 450 TWH, but subsequent years saw a decline, with consumption falling to around 300 TWH by the end of the graph. In contrast, natural gas usage began to rise steadily from the start, reaching approximately 300 TWH by 2010. By the end of the period, natural gas had overtaken coal, becoming the leading contributor to electricity generation.
On the other hand, the use of hydroelectric power remained stable throughout the entire period. Meanwhile, nuclear power experienced slight fluctuations around 2010. In the early years, both wind and solar power contributions were negligible; however, from 2010 onward, their usage began to increase, eventually reaching a level comparable to nuclear power, at approximately 100 TWH