I was wondering whatever happened to the potential for CNG buses. And I found this link http://cleantechnica.com/2015/06/10/electric-buses-beat-cng-buses-mile-n

I was wondering whatever happened to the potential for CNG buses. And I found this link http://cleantechnica.com/2015/06/10/electric-buses-beat-cng-buses-mile-nearly-6/ http://cleantechnica.com/2015/06/10/electric-buses-beat-cng-... which makes the case that they could be replaced by electric.