After the Aeroflot Sukhoi Superjet 100 crash-landed at Sheremetyevo airport claiming the lives of 41 people out of 78, Russian aviation has come under close scrutiny.
An airBaltic Boeing 737-300 was enroute at FL360 about 150nm southwest of Riga when the crew decided to return to Riga due to a smell of ammonia on board.
Probably the biggest issue for green flying is the actual flying. People are constantly travelling by plane and it would be extremely difficult to persuade them not to fly.