measurement
Between 1973 and 2019, the proportionate composition of the global primary energy mix changed as follows: Biofuels and wastes decreased from 10.5% to 9.3%; Coal increased from 24.7% to 26.8%; Oil decreased from 46.2% to 30.9%; Natural gas increased from 16.2% to 23.1%; Nuclear increased from 0.9% to 5%; and Hydro increased from 1.8% to 2.5%.

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