10:31 Dr Julian Huppert (Cambridge) (LD)

One of the other arguments for high-speed rail is that it represents the type of sustainable, environmentally conscious economic growth that we need. High-speed rail is not in itself a low-carbon form of transport, as should be obvious, because machines that run at very high speeds need more power than machines that run at low speeds. However, the modal shift to which many hon. Members have referred makes it much more environmentally sustainable. In fact, that makes it vital for the long-term sustainability of our country’s infrastructure. We have heard about the likely effects for Scotland of a move from air to rail. We have also heard that long-distance services on the high-speed line would free up capacity on other major rail routes. In addition, it is important to remember that the carbon benefits of rail over aviation are likely to improve, and to continue improving, as we develop new ways of decarbonising the electricity supply.

[Source]