Abu Dhabi International Airport has launched an interactive track that collects energy and data from the steps of passengers. It works using electromagnetic generators scattered over 16 square meters. m of connecting triangles between terminal 1 of the airport and terminal 3. The project in partnership with the British firm of clean technology Pavegen and energy firm Abu Dhabi Masdar is considered the first commercial airport in the Middle East. It is claimed that the device is tracked by about 8,000 travelers a day using technology that converts steps into electrical energy to provide data and lighting along the aisle. The system includes screens showing how much energy is collected, with a special game interface for children, which shows that airplanes rise and fall, depending on how much energy is generated. Using cheaper alternative energy sources for energy is becoming an increasingly popular approach. So the Spanish fitness center receives energy from practicing on treadmills and exercise bikes.