Pacific National’s own modelling had calculated the cost of buying carbon credit units at $12 million by 2030 even after it had made substantial investments in new locomotives and rolling stock, Mr Scurrah said. Pacific National was investing hundreds of millions of dollars in a series of major projects to help achieve emissions reduction targets mandated in the safeguard mechanism over the next five years, he added. But he noted there were technology constraints in both rail rolling stock and track infrastructure, beyond the control of Pacific National. “This will result in rail freight operators having to purchase significant numbers…