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Note: Numbers represent estimated Exajoules. Source: adapted from Intergovernmental Panel on Climate Change (2014) Climate Change 2014: Mitigation of Climate Change. The above chart depicts the respective share of energy consumption by type of fuel, transportation mode, type of transport (passenger or freight), and the level of energy efficiency. It

Author: Dr. Jean-Paul Rodrigue Transportation activities are significant energy consumers, providing mobility to passengers and freight, which accounts for about 25% of world energy use. 1. Energy Human activities depend on using several forms and sources of energy to perform work. The more available and affordable energy sources are, the more