Methodology
Energy consumption of each city was calculated using the population of the city and per capita consumption of the country where that city is located, taken from the International Energy Agency. The number of turbines needed was computed as the city's annual energy consumption divided by the amount of power an example turbine can generate in a year. A Siemens high-capacity 8MW turbine SG 8.0-167 DD was used as an example turbine and an assumed offshore wind turbine efficiency of 41% was taken from European Wind Energy Association. Turbine spacing was calculated on the basis of having at least 7 rotor diameters of space between each turbine, as per the UK government recommendation.