Today’s fossil energy system is very inefficient: almost two-thirds of all primary energy is wasted in energy production, transportation, and use, before fossil fuel has done any work or produced any benefit.
Author: European Council for an Energy Efficient Economy (Source: http://www.eceee.org/all-news/news/news-2024/the-fossil-fuel-system-wastes-23rds-of-its-energy-before-it-gets-to-you-inefficiency-is-driving-it-out-not-just-emissions/)