Key world energy statistics 2021 

 - Paris:  AIE  2021 
 - 80 páginas.  gráficos., tablas. 
<br/><br/>Supply. Transformation. Final consumption. Energy efficiency. Energy balances. Prices. Emissions. Research, development and demonstration. Outlook. Energy indicators. Conversion factors. Glossary.  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Consumo de Energía<br/>Eficiencia Energética<br/>Recursos Energéticos - Precios<br/>Estadísticas