It seems logical that coal would be used as the predominant non-renewable fuel of the future until other non-petroleum-based substitutes are fully developed. Coal burns cleaner, despite the false image that associates coal with the dingy, smog-choked air of the old coal-burning cities and towns, particularly during the Industrial Revolution. Furthermore, according to The World Coal Institute (WCI), “technologies have been developed to improve the environmental performance of coal-use techniques” and that the efficient burning of coal-based fuels results in the release of fewer pollutants into the atmosphere. All fossil fuels produce greenhouse gases; but, greenhouse gases from coal contribute to less than 20% of any enhanced greenhouse effect.