I note that new computing devices consume less energy for more computing power.<p>So all things being equal, it's best to replace old hardware with new hardware, since that reduces energy consumption.<p>Or it's best to replace old hardware with new hardware, since that will give you more computing for the same energy.<p>The ecological thing to do is therefore to get new computing hardware!!!<p>Until, of course, no progress can be made on computing hardware efficiency or energy use, but we are certainly far from the limit.<p>On a more theorical point of view, the best computing device is no computing device. Ie. the biological solution. Instead of _building_ computers, let's _grow_ computers, or already, just better use the computer we have in our brains! Biological computers are already way more efficient than artificial computers, and they're bio-degradable. Of course, the problem is that you need 20 or 50 years to build and program them, you'll have to give something for this degrowth fad.<p>Eventually, we'll just build everything in space, and drop the required product down to Earth (but probably not, Earth will be a degrowthed natural reserve, and the technological civilization will live and prosper in space).