Have you ever considered that your hand tools are are probably machine made? Delivered to you by mechanized transport using petroleum based road surfaces? Do you own a car? Do you have electric lights or use candles for lighting? Gas, electric or wood stove? Spinning wheel and hand sewn clothing? Air conditioning or servants waving palm fronds?
I wouldn't be so concerned about the environmental impact of using power tools.
I just rediscovered this thread, and thought I'd drop in a comment on this.
Yes, my hand tools were (and still are, for the newer ones) machine made. But let's talk about resources.
My old brace has a pound or two of steel in it, and some small pieces of wood. My collection of bits adds a few more pounds of steel. It was probably built sometime in the mid 1900s -- there are no remaining identifying marks, so I have no way of knowing. It's been happily drilling holes since then, and could easily do so for another hundred years with reasonable maintenance. The jaws might need a new spring sometime soon, and I probably out to put some lubricant in the jaws sooner or later. It weighs very little, and hundreds could easily be shipped in a single truck. All the oil-based (or nuclear, or coal, or hydro, or solar) energy needed for this tool has long since been used, unless I buy new bits.
Now let's look at my drill press. It's a bench-top model, built in 1980 according to the ID plate, and weighs around 60 pounds, give or take. Most of that is iron or steel, but there's a significant amount of copper in the motor, and some rubber in the belt. The motor will run for a while, but sooner or later the brushes will need to be replaced, and to be honest, I'm not that confident that the motor will last much longer. The belt is starting to wear out, too, and the power cord has already been replaced once. It's fairly big, and the box it was shipped in was bigger still. You could probably put 100 of them on a big truck for shipping. Further, it needs to be plugged in every time I want to use it. So it shows a much higher embodied energy (the energy used to build it), it took more energy to ship, and it uses more electrical energy every time I use it.
The same arguments hold true for almost all hand tools; a rabbet plane is cheaper, energy-wise, to build, ship, and use than a table saw or router. The same comparison holds for a hand-saw vs. a table or band saw. That one is remarkable... a good table saw will mass several hundred pounds, and you'll fit tens of them on a truck. A handsaw weighs only a couple of pounds, and you can fit hundreds of them on a truck.
I'm not saying people shouldn't use power tools: there's a cost in human efficiency, and for production work the math there goes in favor of power tools a lot of the time. But it's not an all-or-nothing equation. If my choice to use hand tools was based on use of fossil fuels (it's not), I wouldn't say that's invalidated by my use of electricity to light my house. I'd say I'm offsetting part of my use. That's something the crunch-granola types have been forgetting all these years. Being eco-friendly (for lack of a better term) isn't all-or-nothing. It's a matter of making some compromises to get a good standard of living while doing as little damage as possible.
Anyway... that turned into more of a rant than I intended: sorry about that. I'll just step off my soapbox now, and go back out to the shop...