Greenhouse gas emissions traded under Europe's ETS dropped 8.7 per cent overall last year, although many airlines saw their CO2 rise
Green groups welcome ICAO's decision to exclude 'questionable' carbon credits from the industry's CORSIA offsetting programme
The move is becoming more common in Europe but is unprecedented among North American airlines
Citigroup analysts predict the cost of carbon offsetting commercial flights could exceed $6bn a year by 2025
Qantas vows to remove or replace more than 100 million single-use plastic items by the end of 2020
New research suggests airlines' climate plans fall well short of Paris Agreement targets