Your home AC, sure. However... pretty much every facility with a physical plant (hospitals, universities, data centers, skyscrapers, factories etc.) uses coolin

Your home AC, sure. However... pretty much every facility with a physical plant (hospitals, universities, data centers, skyscrapers, factories etc.) uses cooling towers to dump heat from their internal systems into the environment. Nearly all cooling towers require a constant water supply. Some water is recycled, but it is not anywhere near a closed loop system.