Engineers in Germany have constructed a 40-meter “wind chimney” that generates electricity using heat-driven airflow. The structure operates on the principle of solar updraft: sunlight heats air at the base, causing it to rise through a tall chimney shaft. As the warm air ascends, it spins turbines that generate electricity. Because heat differentials continue even after sunset, the system can operate beyond daylight hours. The wind chimney offers a compact, urban-friendly renewable energy solut