Translate the following English sentence to French:
"In the light of the discussions between the Commission and the Committee on the Environment, Public Health and Consumer Policy, the Commission proposal of December 1996, which had been produced under great pressure of time, was supplemented in two stages in 1997."
En raison de l' opposition entre la commission de l' environnement et la Commission, la proposition de la Commission de décembre 1996 a été complétée en deux étapes l' année suivante.