But is the supply actually being limited? Won't a similar amount of fuel be transported via rail or trucks? What is the carbon footprint of transporting X kg of

But is the supply actually being limited? Won't a similar amount of fuel be transported via rail or trucks? What is the carbon footprint of transporting X kg of fuel over pipeline vs rail? It seems to me that the main outcome is that the same amount of fuel is transported with a costlier (environmentally, and financial) vehicle.