The presented pie charts compare the percentage of electricity generated from five various sources- coal, gas, nuclear, renewables, hydropower- in a particular country in 2000 and 2020.
Overall, the proportion of coal was by far dominant at the start of the period but dropped substantially after two decades, while that of gas and renewables experienced a significant growth during the same period. By contrast, the share of hydropower remained unchanged throughout.
In 2000, coal accounted for almost half of all electricity generated, at 45%, making it the leading source by a wide margin. Gas and nuclear energy came next making up 20% and 15%, respectively, whereas hydropower’s share was 12% and that of renewables was a mere 8% throughout.
By 2020, a striking disparity was evident. The proportion of coal dropped sharply to a quarter(25%), leveling with renewable, whose share was more than tripled. Conversely, gas had risen to 28%, dominating the chart, while nuclear had fallen to 10%. Hydropower was an only power which stayed constant at 12% in both years.