World population will continue to increase. Reducing consumption of oil is laughable. Totally impossible. At best, we can slow the rate of demand growth.
But in a world where energy demand will still need to be filled, alternative energy sources are few because the energy released by a barrel of crude provides the most bang for the buck by a large margin.
When China becomes totally electrified with dams like the one across the Yangtze, they will explode as an industrialized nation.
We will be replaced as the world's number one energy consumer.