Okay, call me a spoilsport, but as much as we all might wish otherwise, there really is no free energy lunch. Not so long as much or more needs to be put in to get it than it yields, that removes more valuable land and other resources from more beneficial uses than it is worth, that isn’t reliably available in sufficient quantities when and where needed, that promises highly debatable environmental advantages, that costs consumers lots more than “nonrenewable” alternatives, and whose sustainability depends upon endless government mandates and subsidies.