Translate the following English sentence to French:
"This is one of the aims that LIFE-Environment must achieve. Thirdly, the fact that the common position has for the first time introduced upgrading and planning for coastal areas as one of LIFE-Environment' s priorities is an extremely positive step."
Troisièmement, nous nous réjouissons de ce que la position commune a introduit, pour la première fois, la valorisation et l'aménagement du territoire des zones littorales parmi les priorités de LIFE "environnement".