Translate the following English sentence to French:
"We are well aware that, in the European Union, a whole raft of directives such as the directive on habitats and the directive on migratory birds encounter problems in implementation. With LIFE-NATURE we should be able to support policies which demonstrate the feasibility, the validity of the objectives of these directives, and their capacity to be implemented."
Nous savons bien que, dans l' Union européenne, toute une série de directives, comme la directive "Habitats", la directive "Oiseaux migrateurs", se heurtent à des difficultés d' application : nous devrions pouvoir, avec LIFE-Nature, accompagner des politiques qui montrent la faisabilité, le bien-fondé, la capacité de mettre en uvre les objectifs de ces directives.