When it comes to fighting climate change, every bit counts. At least, that was the thinking behind a small test project last summer at a metro station in Paris, the city where the world’s first ...

Last summer, a pilot project in central Paris turned turnstiles at the Miromesnil station into mini turbines, converting kinetic energy into electricity as commuters pass through. The company behind ...

Forbes contributors publish independent expert analyses and insights. Alex Ledsom is a France-based contributor who covers travel. The Paris metro system is 214 km long (133 miles) and it has 303 ...