The shale-driven price of natural gas in the USA has fallen below $2 / MMBTU. This is a good bit less than one quarter of the current price of gas in the UK and NW Europe (and perhaps an eighth of that in Tokyo) - the kind of structural disadvantage to our economies we can't tolerate.
Few expect $2 to last for long: it will drive a supply / demand readjustment. But this isn't a small differential, either. And 'experts' had been predicting shale couldn't be produced below $5 ... or was it $4 ? ...
Gotta get fracking.