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Barcelona's subway system converts trains' braking energy to power the metro and charge electric cars, saving 6% of its energy.
Barcelona's subway system has launched the MetroCharge project, which uses energy from trains' brakes to power the subway and charge electric cars.
Sixteen stations recycle the braking energy, saving 6% of the metro's total energy and expected to recover the €7.3 million investment in four years.
The project includes solar panels and supports Spain's efforts to increase electric vehicle usage and combat climate change.
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El sistema de metro de Barcelona convierte la energía de frenado de los trenes para alimentar el metro y cargar coches eléctricos, ahorrando el 6% de su energía.