My friend and I were just talking about how they should put a bit of oil/natural gas at the top of all those little 911 repeater/tower/whatever things that are

My friend and I were just talking about how they should put a bit of oil/natural gas at the top of all those little 911 repeater/tower/whatever things that are sprinkled throughout the city to turn them into a sort of "Beacons of Gondor" type thing, as an absolute-last-resort communication method. Mostly jokingly.