 Air Products & Chemicals of Allentown, Pennsylvania and Collier Technologies of Reno, Nevada have teamed up to study the possibilities of using Hydrogen as a fuel for public transportation.PTI was able to get funding by the Pennsylvania Department of Environmental Protection and the Pennsylvania Department of Community and Economic Development to convert one of CATA's forty-foot New Flyer C40LF buses to run on HCNG, which is a hydrogen/natural-gas blend.The bus can be seen (and heard, given its distinctive higher-pitched engine noise) primarily on the Blue Loop, as well as the N, R, and V routes.