One of the Climate Commission's key proposals - and its final advice - is to mostly i­mport and register new electric cars by 2035. But there's been criticism about whether more can be done to reduce the emissions from the fleet already on the road. The Automobile Association says we should make more use of carbon neutral biofuels. So, to find out whether that's realistic, Max Towle speaks to Dr Paul Bennett from Scion forestry research.