Currently, single decimal place digit kWh/person. Now the improvement in power supply tech and using laptop components saves you about as much. (say 0.1 kWh/per

Currently, single decimal place digit kWh/person. Now the improvement in power supply tech and using laptop components saves you about as much. (say 0.1 kWh/person to 0.04 kWh/person) On personal level, using a vacuum flask to boil your coffee should save more. Cars are much more expensive thanks to materials. There, longer cycle is a major saving.