I believe its because solar energy technology is limited and needs more research to advance it. It takes so many sq ft of solar panels to generate a limited amout of power, providing the weather is in favorable in conditions.Aren't Three Mile Island Cernybl and Japan enough. You are already putting up these gut wrenching (vibrations will w your guts) Windmills. The real question should be when is the government going to develope and deliver Solar cells. All the rest are corporations preserving their control on your power/comfort.
So what it boils down to is that when something is gained something is lossed. If we want solar power, it will cut into food production in crop field which will then lead to the rise in prices of food to compensate for the results of loss profits in the electric company. And that is IF they invest in food production stocks.