Hey, air conditioning doesn't belong on that list. It uses a lot of energy but it also significantly improves quality of life in hot and humid regions of the pl

Hey, air conditioning doesn't belong on that list. It uses a lot of energy but it also significantly improves quality of life in hot and humid regions of the planet. And unlike the other items on your list, there's no ethical or intrinsically pollutive aspect to it. Also lots of developments in newer more energy efficient compressors and DC ACs with smarter control algorithms meant to run with solar.