If Jason Kenney wants to nix the fed carbon tax, he can do so.  All he needs to do is put in a roughly equivalent provincial one.  The Supreme Court has already given an opinion on this, and, if necessary, he can get his buddy Brian Pallister to explain the hard parts to him.  Possibly while they're on vacation in Costa Rica.
Personally I want KM to go forward and believe it will.  We will still be hip deep in the carbon economy for at least the next half century.  Canada's contribution to global GHGs is a drop in the bucket, so to speak. And improving tech is making the footprint smaller at the user use end of the cycle.
Politically this might have a price in BC for the Libs, but will play fairly well in Ontario, a simple trade off.  That's a simple reality in Canada.