translate English to French: Thus, by 2005 the Aral Sea has lost four fifths of its volume, its surface area had shrunk by more than two thirds, its level had dropped by 22 metres and salinity levels have increased sixfold to twelvefold.
Ainsi, en 2005, la mer d'Aral avait perdu les quatre cinquièmes de son volume et plus des deux tiers de sa superficie; son niveau avait chuté de 22 m et sa salinité avait augmenté de 6 à 12 fois.