IEA (2019), "Key World Energy Statistics 2019", IEA, Paris https://www.iea.org/reports/key-world-energy-statistics-2019
IEA Key World Energy Statistics (KWES) is an introduction to energy statistics, providing top-level numbers across the energy mix, from supply and demand, to prices and research budgets, including outlooks, energy indicators and definitions.
KWES is part of the IEA's annual edition of the world’s most comprehensive series of energy databases and data services, which include World Energy Statistics and Balances and the full range of fuel information data services.
Energy supply refers to all the types of energy that are produced, whether that means coal mining or power produced from a solar panel.
Some energy needs to be transformed to become useful, whether through refining, or combustion to produce heat or electricity.
Energy is consumed to do work in all aspects of our economies, such as industry or transport.
Monitoring the effectiveness of energy efficiency policies requires reliable data and indicators on how energy is used across all sectors.
Energy prices play a key role in industrial competitiveness and influence decisions on how we use energy.
The energy sector plays a key role in mitigating climate change, as CO2 emissions from energy account for the largest share of global greenhouse gas emissions.
Through energy RD&D investment, governments guide their economies towards activities they value as important, such as the long-term acceleration of clean energy technology improvements.