Coal isn't the cheapest [1]. Natural gas is cheaper because of fracking. Renewables have been reported to be cheaper than fossil fuels for the first time in 2016 [2]. Electric vehicles are cleaner than gasoline cars almost regardless of where the electricity comes from [3]. I think in Missouri EV are on-par with gas because Missouri has the dirtiest power plants.

[1] http://wolfstreet.com/2016/06/13/why-us-coal-production-coll...

[2] https://qz.com/871907/2016-was-the-year-solar-panels-finally...

[3] http://midwestenergynews.com/2016/04/20/minnesota-study-chal...