Skeptic, the Royal Commission headed by Berger resulted in a 10? 12? year moratorium on the pipeline pending more assessments on social and economic impact. What really killed it at the time was less ecological and sociological than economical. There was a significant down turn in oil and gas prices, which put a crimp in the feasibility.
With the higher gas and oil prices of recent years, there has been a resurgence in interest in building the pipeline again. And since the Commission of the 70's, there seems to be a lessening of concern for the environmental impact, in exchange for the aboriginal people of the area getting a more significant piece of the pie.