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Keywords: TechEfficiency.PNG The effect of technological progress on energy efficiency and thus the consumption of energy Blue curves show the consumption of fuel coal kg/kwh after different innovations red curve shows maximum thermal efficiency Watt p stands for Watt pump Watt m for Watt mill X axis shows years Source Shell 2001 Energy Neeeds Choises and Possibilities - Scenarios to 2050 2006-03-26 own assumed Tungsten Energy efficiency |