How to keep a hotter world cool without using more energy

After another summer of extreme heat, the response from people experiencing it is understandable: They want better methods of cooling. Recent polling across six European countries found strong support for greater access to air conditioning, with majorities backing it as standard in new homes. Air conditioning has transformed modern life, and in hot countries such as Saudi Arabia, cooling is essential infrastructure. But meeting growing demand simply by installing more air conditioning has conseq