01 Sun – photovoltaic panels
Sunlight, which is electromagnetic radiation, falls on a photovoltaic plate. There it activates a silicon film which causes its atoms to release their electrons. These electrons follow a fixed path through a circuit, thus generating an electric current that can power electrical devices.
02 Air (wind) – wind mills
Windmills are very large dynamos, where the wind pushes against the blades that turn the dynamo inside. The magnets inside the dynamo create an electric current that can power electrical appliances.
Water is a chemical compound of the elements hydrogen and oxygen. If their bond is broken, water, which is liquid at room temperature and pressure, is transformed into the gases hydrogen and oxygen.