> It has to do with tax rebates for more efficient cars, ever increasing EPA fuel efficiency standards, ever increasing EPA factory emissions standards, heavy subsidization of renewable energy not just by the West, but by China, etc.

All of that, and the effects mentioned by the author, are a blip compared to the effect of nat gas becoming cheaper than coal in North America. In fact, the reduction of CO2 output caused by natural gas replacing coal is actually larger than the total reduction of CO2 output -- that is, without fracking, US CO2 output would have grown.