How is electricity produced at a power station?

In a coal-fired power station, a boiler burns coal to produce steam. The steam makes a turbine spin. The turbine drives an electricity generator. The electricity from the generator is converted to a higher voltage by a transformer. This higher voltage is to enable transmission over long power lines without losing too much energy. When it comes to reach our homes, it is then converted back into lower voltage by other transformers. Nuclear power stations are similar - instead of a coal-fired boiler, a nuclear reactor creates the steam. Wind turbines use the blades to turn the generator.