The pie charts below show the electricity generation by source in China and Spain in 2005 and 2015. Summarise the information by selecting and reporting the main features, and make comparisons where relevant. Write at least 150 words.

The pie charts illustrate the percentages of electricity generation by four distinct sources in China and Spain in 2005 and 2015.

Overall

, it is evident that the vast majority of China's

energy

was produced from burning coal in both years. Meanwhile, Spain's predominant

energy

source shifted from

oil

and

gas

to renewables over a decade. In 2005, the share of coal in China accounted for 80%, followed by renewable

energy

with 16%. After ten years, the renewables' percentage rose to 25%, paralleled by a slight decline in the use of coal to 76%.

In contrast

, the

oil

/

gas

and nuclear

energy

figures remained only diminutive in both years. In Spain, natural resources were the primary sources for

energy

production in 2005; 32% and 30% of the total was generated from

oil

/

gas

and coal, respectively. Notably, the share of renewable

energy

more than doubled from 18% to 37% over a subsequent decade.

Conversely

, the 2015

oil

/

gas

and coal figures dropped by 9% and 10%, respectively. Meanwhile, the share of nuclear power persisted at 20% over the same period.