Is Sweden using an unsustainable amount of heaters to fight against deadly winter temperatures? Air conditioning is much more efficient than a heater. Arizona will usually only get more than 15 degrees warmer than a comfortable indoor temperature. In places with cold winters, sometimes temperatures will get more than 25 degrees cooler than a comfortable indoor temperature.

It’s also technically one of the easiest places in the US to provide all your energy by yourself with solar.

That is the case now, but this does not have to be true. It's entirely possible for Arizona to meet its household energy needs renewably.

Arizona is electric unsustainable? California has rolling blackouts now