This information is rather suspect. The report says that manufacturing a PC takes 1.7 tons of material, but 1.5 tons of that is water. What's the marginal additional water consumption per PC? I don't care if 15 tons of water are used, if that water is filtered and reused. It also doesn't matter if the rate of consumption is less than the rate of production, especially if the consumption is but a fraction of what people waste on their pools and lawns. For example, *vast volumes* of water are used in steel production. But the steel industry recycles 95% of their water now. You will also find that wafer fabs that produce chips have much higher recycling rates than non-electronics industry.
Total consumption of fresh water by industry in US is 15%. Consider your PC made with 1.5 tons of water. By contrast, a low-flo 2.5gpm shower, if you take, for instance 10 minute showers, will use up 1.5 tons of water in 15 showers. If you take 5 minute showers, it uses an equivalent amount in 30 days. Unless you're buying a new PC every month, the resources used to produce a new PC for you are dwarfed by your showers, your pooping, and your lawn sprinklers.
As for PC's power supply units. Blame Tesla and Westinghouse. Roughly 50% of a typical PC's power is WASTED by the AC/DC conversion. A superior design would place an AC/DC converter on the outside of your house, and have electrical outlets in your house deliver DC to all your DC-oriented devices, instead of having each device do the conversion.
If you co-locate some machines at a ISP or co-lo provider, they often will give you the option of taking pure DC on your rack and they'll give you a lower monthly cost, since the biggest problem for rackspace providers is power density.
This report is just more scaremongering. If you added up *ALL* the resources used to deliver your PC to you, not just manufacturing, but transportation, food to pay workers, construction of warehouse to store it, energy to drive and construct boats, planes, and ships to ship it, then it would look even more unbalanced. A huge amount of infrastructure had to be "brought online" during the 90s to deal with this, including way more trucks on our nations highways. Ooh, scary. I hope Hellboy ends the world first, so we don't die of starvation and pollution right?