How much will a kilowatt-hour (kWh) of electricity cost in 2040? The short answer is: a lot. How much would it cost to preserve the energy service of that kWh without actually generating it? Less — much less, in fact.
You can heat a poorly insulated house to achieve a certain level of comfort. Or you can insulate the house and achieve the same level of comfort while using less energy. Given two options that offer equivalent comfort, most people would normally opt for the cheaper one.
