Some industry players believe commercial electric flights could be just five years away, and the move to electric may help to improve connectivity with the regions.
A select committee report on RMA reform proposals says tighter definitions and greater clarity needed on contentious issues or there will be years of uncertainty and legal argument.
Canterbury's mayors have taken their transport concerns to the minister.
Rio Tinto says it’s committed to remediating soil contamination at the 50 year-old heavy industry site.