His behavior is worthy of respect.
- Son comportement force le respect.
I can't stand his behavior anymore.
- Je ne peux supporter son comportement plus longtemps.
It's evident that human behaviour is more dangerous for the environment than radiation.
- Il est évident que le comportement humain est plus dangereux pour l'environnement que la radiation.
There is no excuse for his behaviour.
- Il n'y a pas d'excuses à son comportement.
Aren't you ashamed of the way you behaved?
- N'as-tu pas honte de ton comportement ?