Some countries have already committed to using electric aircraft on domestic routes. These aircraft could slash costs and emissions on some of Australia's busiest flight routes.
The Coalition's infrastructure budgets over this term of government have been around the midpoint of government investment over the past decade. But how projects are chosen leaves a lot to be desired.
Despite boasts of 'record' infrastructure spending, relative to GDP it's comparable to previous budgets. What's different is that Treasurer Frydenberg has chanced his arm more over the longer term.
The focus on roads reflects the fact that this infrastructure program lags well behind the growth of our biggest cities, resulting in less-than-ideal transport patterns.
The major parties are promising projects costing tens of billions of dollars, with a surprisingly large overlap between them. Yet only two have been endorsed by infrastructure authorities.
Every major transport study since the 1970s has identified Sydney's western rail corridor as the priority for an upgrade. The latest patronage figures confirm that's where the need is greatest.