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

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

energy

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

energy

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source shifted from

oil

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and

gas

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

energy

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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

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, the

oil

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/

gas

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and nuclear

energy

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

energy

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

oil

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/

gas

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and coal, respectively. Notably, the share of renewable

energy

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

Conversely

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, the 2015

oil

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/

gas

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