The drones are lightweight. That’s why they require only about one-eighth of the resources in production compared to an average car (steel, aluminum, plastics, …). We also do better by a factor of 1/100 to 1/1000 in terms of infrastructure than cars, for which roads and bridges, tunnels and gas stations have to be built. For the flight, we calculate a consumption of 30 kilowatt hours per 100 kilometers.