Translate the following English sentence to French:
"The rapporteur points out that more than 25% of the petitions lodged concern environmental problems, freedom of movement, fundamental freedoms and the internal market, issues that, in my view, are central to the European Constitution."
Le rapporteur signale que plus de 25 % des plaintes portent sur l' environnement, la libre circulation, les droits sociaux des citoyens et le marché.