What about Solar Energy?

So,
What about solar energy?
It seems to me that solar technology has been around long enough that we could harness this energy to reduce so much of the energy consumption on this planet.
According to research, the Gobi Desert ( NW China and Mongolia ) could supply nearly all the of the energy consumption on the planet !
So why haven't we put the most abundant source of energy to full capacity yet?
If we spent the same billions of dollars that we spend on Oil research and Technology wouldn't we have already reached our energy demands by the means of solar power ?
I think this is very plausible.
But there is an important factor at work here.
The oil and coal companies have long kept a firm grip on the technology that is supplying the world with power.
A guy trying to find a cure for cancer accidentally found a way to burn salt water with radio waves for Christ's sake !
Unfortunately he said he would sell the patent to any company so he could continue his quest for a cancer cure. ( Gee, I wonder who bought that patent? )
The only option for us ( the ones who have to pay for and consume energy ) is to demand solar power. That's the only way.
I hate to say this but unless the same oil and coal tyrants who have been in control of the resources for so long are the ones who will make money off of solar energy, then I believe that it won't come about as fast as we would all like.
I would love to hear other people's opinions and research on this matter.
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Stay Green,
- Ms. Green