Holidays, work trips, cargo, freight and parcels; we rely on aviation personally and for business. But aviation's carbon footprint is huge, so what are some of the sustainable technology changes taking it into the future? A handful of manufacturers are looking at reviving the production of seaplanes for a new age in aviation, including Amphibian Aerospace Industries in Darwin. Professor of Aviation at Brisbane's Griffith University Tim Ryley weighs in on the future of seaplanes.