@ John Muir,

What are the emissions related to fracking? Methane? Fracking waste water? radioactive material? sound? You can't just cherry pick one item and call it a thoughtful analysis. How many of these emissions effect the carbon footprint? 

Please post the link to the journal article you are citing in regard to the "largest driver in reducing Americas carbon footprint". Must have been extensive, to include all energy required to build drilling rigs, make and install pipe, mine materials needed for this, accounting for exhaust methane and so forth. I am genuinely interested in the research you are quoting. 

Thank you