Air passenger dutypublished at 12:24 Greenwich Mean Time 14 December 2017
Mr Harvie moves on to the government's policy on cutting Air Passenger Duty.
Plans to replace air passenger duty with a discounted alternative were disrupted by legal issues.
The Scottish government wants to replace Air Passenger Duty (APD) with a new devolved Air Departure Tax (ADT) in Scotland from April next year.
However, it said plans to continue exempting journeys from airports in the Highlands and Islands required EU approval under state aid rules.
It is understood that getting this approval could take longer than Brexit.