Engineers installed hidden turbines inside subway gates. Every time someone walks through, electricity is generated. In one Paris pilot station with 27,000 daily commuters, the system produced around 2,000 kWh per day. The results were strong enough that Spain committed €10 million to expand it across 19 stations. With roughly 2 million riders per day, this creates meaningful clean power from movement that was already happening. This is what the next phase of clean energy looks like. Not disrupt