And make large geographical areas uninhabitable for decades.

Large areas would be uninhabitable without heating in the winter or air conditioning in the summer.

They give off a lot of heat into the atmosphere, and for some of you may understand the heat island effect in cities, where the urban areas are much more warm than the adjacent rural areas, but we also have problems that, when we lose power, we can't open a window here, and so the buildings are uninhabitable and have to be made vacant until that air conditioning system can start up again.