Air-conditioners do great good, but at a high environmental cost
I am very skeptical.<p>Air conditioning has enabled large amounts of people to move from cold climates to warm climates (places like Dallas and Hong Kong basically wouldn't exist like they do without it). And there is a lot more energy spent heating in the north than there is cooling in the south. So on average, I would assume there is a <i>net benefit</i> if you consider the tradeoffs.<p>I think there is a stigma people have that heating is essential for life, but A/C is optional. But we should really compare them against each other.