If the US really wants to become low omission and energy efficient, we shouldn't let companies export NG. Why? Because:
a. prices will go up too fast, and that's not good for US consumers, many of who are hurting.
b. higher prices will slow energy use conversion here in the US.
c. It will take us longer to run out of this cheap source of energy, lengthening our energy independence if we don't export it all. Do we really want to go right back into square one - where we were before fracking came along?
But will this happen? nooooooo, and you all know why.