The basic problem with this argument is that it implies that Alberta has a greater right to market its resources than BC has to protect its resources.  

Simple right of ways were less of an issue before we began to realize and seek to act to preserve and protect the environment.   Just because one pipeline exists doesn't mean two or more are needed or safe for the environment.  Alberta may seek to risk their environment in the blind pursuit if profits, but that doesn't mean any other province is obliged to assume the same risk and harm.  

I certainly don't support Clark's right action for the wrong reason because it is disingenuous in its intent.  Her government is not seeking to protect the environment in this action, it is instead engaging in profiteering for political expediency.  

The fact that this action might preserve our environment doesn't make it right but the right thing to do is protect resources that are vital.