Ah...all home electrical power is cyclical. It comes in sine waves, and it doesn't matter to the current whether it goes into a computer or a lamp. If it's bothering your eyes, use something else -- I was getting ocular migraines from a CRT monitor and I switched to a LCD flat panel -- no more headaches.

As for CO2 emissions -- the Kyoto Accords are fine as far as they go. But the problem actually HAS happened, and the Accords only address NEW carbon dioxide emissions and do little or nothing about the CO2 that has already been emitted and the damage that has already been done. The "Greenhouse Effect" is not going away anytime soon, and we'd damned well better learn to live with it and see what, if anything, can be done to reverse it. (This is not to say that controls shouldn't be in place, but that they are a bit late in the game.)