New research reveals next-gen energy source that is plunging in cost: 'This technology is no longer a moonshot prospect'

The short summary is that the evolution in the technology used in solar means that it costs less than 3cents (US) to produce a KW to produce. 

Though of course installation is still a large cost, and storing the energy at night has pitfalls. 

But the larger point stands: it is much cheaper to harness the sun than to mine for coal or capture natural gas. And less hazardous too. 

https://www.thecooldown.com/green-business/solar-energy-university-of-surrey-cheapest-power-source-cost/