Vertaling van "international levels while improving safety becomes " (Frans → Nederlands) :

- At the same time capacity in the air and on the ground is increasingly scarce, the environmental impact a growing source of concern at the local and international levels, while improving safety becomes ever more challenging with increasing traffic levels.
- At the same time capacity in the air and on the ground is increasingly scarce, the environmental impact a growing source of concern at the local and international levels, while improving safety becomes ever more challenging with increasing traffic levels.