yes and PP presupposes "cheap natural gas." as witnessed by recent fracking-induced earthquakes [1] there may be very little cheap natural gas in the future.

yes and PP presupposes "cheap natural gas." as witnessed by recent fracking-induced earthquakes [1] there may be very little cheap natural gas in the future. [1]http://www.sciencemag.org/content/341/6142/1225942 http://www.sciencemag.org/content/341/6142/1225942