A while ago, I had a chat with a scientist who posed this question. What will the world be like if the cost of energy went to zero? It seems like an absurd idea, as we live in an era of rapidly increasing gas prices. But while gas prices are going up, the cost of producing solar energy is rapidly decreasing. And within 20 years, it is possible that we will reach a point when we produce enough solar energy to meet the needs of the entire planet, at close to zero cost.