Hydrogen can't be transported in existing natural gas pipelines. (ddears.com)
Spectra Energy's planned New Jersey - New York Expansion pipeline is, as the name suggests, an expansion of two existing natural gas pipelines intended to bring into Manhattan natural gas obtained by fracking in the Marcellus Shale of upstate New York. (treehugger.com)
Part of TransCanada's plan for building Energy East includes converting an existing natural gas pipeline to carry bitumen from the oil sands. (jeffrubinssmallerworld.com)