The ownership of computers in the home is far less than the statistics show because usually when the computer breaks down once that is the end of it for a long long time. They do not have the money or incentive to get the computer repaired.
We need a number of solutions - we need more efficiency and conservation. Efficiency is a big one. I think car companies need to do a lot better in producing more efficient cars. They have the technology we just need to demand them as consumers.