8 Wind

power per person = wind power per unit area (2W/m2) x area per person (size of the country/population: UK 4000m2/p) = 8000W/p = 200kWh/d/p. If 10% of the country is used in this way: 20kWh/d/p (= half of the power used by a car/p). To achieve this the entire world wind farms should be doubled to only provider the UK with this amount.