Civaux Nuclear Power Plant

You're standing at the Civaux nuclear power plant, on the banks of the Vienne River. You really can't miss them: those two giant cooling towers. They're 178 metres tall, the highest at any of the nuclear plants run by the French energy company EDF. And what you see rising from them isn't smoke, it's water vapour. The plant is cooled with outside air and with water from the river right here.