It's a trival and useless form of energy that will never be clean and will never be sustainable.
I'm an old man; and I've been hearing these useless predictions my whole damn life. You do realize, don't you that the solar cell was invented in 1954?
The result in the inexplicably popular but dangerous faith in solar energy is that the concentration of dangerous fossil fuel waste reached more than 411 ppm this year, despite the fact that the asshole Amory Lovins predicted in 1976 that by the year 2000 the United States would be producing 20 "Quads," (1 Quad = 1.055 exajoule) of energy.
On the whole dying planet, the solar industry doesn't produce 2 quads as of 2018, despite the production of thousands upon thousands upon thousands of soothsaying graphics like the one you produced here, year after year, decade after decade, 100 billion tons of carbon dioxide after 100's of billion tons.
Do you have any idea of how many similar soothsaying graphics I've seen in my lifetime? I'm not young, but I was seeing them when I was.
This bullshit is irresponsible and frankly criminal, since it dumps responsibility on future generations to do what we have been unable to do ourselves.
Here's the 1954 Bell Labs ad telling us that solar energy would save the day:
Guess what? It didn't save the day.
The great "benefit" for mankind has proved to be wishful thinking, massive environmental destruction and an industry that can't even produce enough energy to power all the computers and servers dedicated to saying how great it is.