Translate the following English sentence to French:
"I think it is something of a problem that the targets are repeatedly changed before any proper assessment has been made of the effects, in practice, on the environment and the costs to industry of the legislative measures that have been adopted."
Je trouve un peu problématique le fait que l' on modifie constamment les objectifs avant d' avoir évalué comme il faut les effets concrets pour l' environnement des mesures législatives adoptées et les coûts pour l' industrie.