does anyone else have HUGE issues with their chart? it makes it seem like solar provides something like 20% of the world electricity and hydro electric is not even a mention. meanwhile, as far as I know (wikipedia) solar is only 1% of the worlds total electricity and hydro around 16%
Additions are what's called a leading indicator. They are predictive about the direction of change in a system. If there is much more solar added than coal, then the overall make-up of the system will shift towards more solar, less coal overall... It is future-looking.
