"Coal use" isn't going to disappear, despite the best effort of the greenies to eradicate it.
It's just too vital a component of the power-generation system.
Nuclear is no longer commercially viable nor publicly "acceptable", particularly after the Japanese disaster. Few if any new-construction nuclear plants are going to happen in our lifetimes.
Natural gas seems to be working for now, but eventually the gas fields will "play out". What supplies remain will eventually be needed more for residential and commercial/industrial applications.
Solar and wind?
That's laughable.
Both of these industries have to be heavily subsidized by the government, and both require some kind of "fossil fuel backups" to keep electricity online when the wind ain't blowin' and the sun ain't shinin'.
That leaves coal.
There's at least 400-500 years of it "in the ground".
It's become technically possible to reduce most (I said "most", not "all") of the emissions during power generation.
It's easily accessible, transportable, and -- unlike natural gas -- it can be stockpiled by utilities if necessary.
Coal ain't goin' nowhere.