When it takes 15 years simply to get permission to do something, you know that your country will never be competitive globally.
Either the benefits outweigh the downsides, or vice versa. A group of 10 of the right experts ought to be able to decide that in a week.
Spending 15 years paper-pushing, doing court battles, public enquiries, etc. just delays the process. At the end of the day, you will end up either doing it or not doing it, and whatever you choose is best decided quickly (with the right expertise).
Perhaps we should adopt a system like for the choosing of popes - we lock the experts in a room till they come up with a consensus conclusion.