"It has in the political sense, but there's a lot of focus on it in the aviation sector, particularly in Europe."
International airlines are the airport's key customers, ensuring it hasn't lost sight of climate change's significance for the business. That's not to say Fryer hasn't had to work at getting all parts of the company to take the sustainability message on board. That has been his biggest challenge, he said.
"Everyone talks about embedding sustainability into the way you do business but there aren't any easy wins. I think in the past 18 months, though, it has gained a lot of momentum, so it's become easier as time has gone on."
The judges of the Energy Efficiency and Conservation Authority award, which Fryer received last week, were in no doubt about his achievements.
By "taking the leadership team with him" he had helped the airport to hit its carbon dioxide reduction target two years ahead of schedule and to cut its energy bill by $1 million a year, they said, and he was "an inspiring model for other energy managers". The airport's record earned it a place on the Dow Jones sustainability index in 2012 and 2013 and it is the sole New Zealand company in the 2014 year-book compiled by sustainability investment specialist RobecoSAM.
Fryer said that shows the company's sustainability programme is getting towards international best practice. "We're up there featuring next to Frankfurt airport and global companies such as UPS and Deutsche Post."
The Herald is an editorial partner of the Energy Efficiency and Conservation Authority Awards.