Bonjour
To travel green I would :
I would use public transportation or walk or bike.
I would choose eco friendly destinations.
( Alaska, Costa Rica, Bélize, Virgin Islands.)
I would stay at green hotels.
I would travel light ( the lighter you pack will save you energy and money )
I would go digital : to save paper and time by having travel tickets in my phone)
Voilà mes idées
J’espère t’avoir aidé
Bonne journée