TED: Bill Gates on Energy: Innovating to Zero

Factors that contribute to CO₂ emission.

Theres little we can do about
1. Population - increases with time.
2. Services Per Person - increases with time.

But, we can make a difference in
3. Service Per Energy - by better energy saving inventions.
4. CO₂ Per Unit Energy - reduce carbon emission, with renewable energies, Nuclear energies.

Finally, not just Bill Gates's wish. I'm sure is everyone else's wish.