In the 4G era, telecom towers were giant, ventilated structures. In the 5G era, the strategy has changed to "Small Cells." To get those ultra-fast speeds, we are mounting thousands of small, densely packed radio units on street lamps, electricity poles, and building walls.
While these units are small, they are power-hungry. A 5G small cell can consume up to 3x more power than a 4G ... https://cometenvirons.com/