The Most Overlooked Clean Energy Source… Is Under Your Feet

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How Subways Are Powering Cities. Go to for an innovative way to stay fully informed on tech, energy, the climate and more. Save 40% on the Ground News unlimited access Vantage plan with my link. Every time a subway screeches to a stop, commuters pour out, new riders pile in. Just another day on the rails. But what if that screech could do more than just move people? In Barcelona, it does. They’ve taken the regenerative braking you might know from your EV and cranked it up to city scale. Now, their metro isn’t just moving passengers, it’s powering escalators, traffic lights … and even EVs. It’s a sneak peek into a future where energy isn’t only harvested from solar panels or massive power plants, but reclaimed from the overlooked rhythm of urban life. So, how much energy are we letting slip through the cracks, and what happens when we start catching it?

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Chapters
00:00 - Intro
02:17 - What is RB?
05:42 - Barcelona and MetroCHARGE
09:28 - Challenges and Drawbacks
11:53 - Outlook