Linux reduces e-waste by 50%
Thus, a world using Linux would be a world with half the computer waste (and, admittedly, halved sales for Dell and the rest.)
A widespread switch to Linux could prevent millions of tons of waste from going into landfills. Every computer not needed would prevent the use of 240 kg of fossil fuels. Spread that out over the 17.5 million computers that wouldn't be going obsolete every year and Linux could deliver the world a much more sustainable future. Link (via Digg)