Ubiquitous solar

I have a dream about solar panels everywhere: over car parks, on top of shopping centre roofs, over garages, on house roofs, all feeding 100% clean power into the grid and eliminating the need for coal.

And it's happening -- in India.  And not because of subsidies or incentives but simply because solar panels are now so cheap they pay for themselves in 3 years.  Remember, though there is a tiny (0.5%) annual drop in output as panels age, basically they will last at least 25 years.  So there will be 22 years of completely free electricity.   The Indian power gap will likely be filled by solar, not coal.