Re: Less gas than was thought.
Note this, though:
"The new estimates are much higher than the last assessment by the Geological Survey in 2002. Those estimates - which suggested the Marcellus contained only about two trillion feet of recoverable gas - were provided before new technology had drastically increased drilling for natural gas in shale formations."
Human ingenuity has already increased the reserve by a factor of 42. We'll see where it goes from here.