Translate the following English sentence to French:
"Their Green Paper initiative is a clear demonstration of their determination to tackle the problem, and I should also like to thank my colleagues on the Committee on Legal Affairs and the Internal Market and on the committees whose opinion was requested, who have made a considerable contribution to the enrichment of my work."
L' initiative du Livre vert marque bien sa volonté de s' attaquer au problème et je remercie également mes collègues de la commission juridique, et des commissions sollicitées pour avis, qui ont beaucoup enrichi mon travail.