In the context of the climate emergency, the international transport hub stakeholders are deeply mobilizing. Making commitments on direct emissions which the aim for certain stakeholders is the net zero emissions 2050. But the real transition will take into account all the air and port platforms including the upstream and downstream of the chain. What is the path towards carbon neutrality? What concrete actions? New fleets, new fuels, optimization of operations, aircraft or hydrogen boat but also local energy production. Towards new models.