Montreal, April 11, 2016 – With Green Key Global’s Green Key Eco-Rating Program, which is favoured by hotel establishments in North America, just recognized by the Global Sustainable Tourism Council (GSTC), Transat is pleased to announce that all of the hotel certification programs it promotes now comply with GSTC criteria, the global benchmark for sustainable tourism. Transat’s customers can now be secure in the knowledge that, whichever eco-friendly hotel they choose, it conforms to the highest social and environmental responsibility standards.