“Turns out that when something gets cheaper, or more efficient, we just end up using so much more of the stuff that the savings disappear under a wave of increased consumption.

They call it the “Jevons Paradox”, and it applies to pretty much any human resource. Halve the price of computer memory, we'll increase demand by a factor of four. Increase solar efficiency by ten times, we'll suck back twenty times as much of the stuff. And you just know that if we resort to geoengineering to buy time—use stratospheric sulfates to compensate for ongoing carbon emissions, for example—people will just be that much less inclined to cut those emissions any time soon. We are not wired for restraint; let us off the leash, and we will devour whatever is available.”