Wind power in Europe produced 142,000,000,000 kWh of electricity in 2009, equal to 4.2% of the EU's electricity demand and enough to power 35 million households. €11 billion was invested in wind turbines, saving €5.4 billion in fuel costs and €2.275 billion in avoided CO2 costs. Wind power avoided 91 million tonnes of CO2 emissions, the equivalent of removing 46 million cars from the road.