(a) The available scientific evidence suggested that growing concentrations of GHG in the atmosphere had already resulted in significant climatic changes, which were predicted to increase in the future.
a) Les preuves scientifiques disponibles permettaient de penser que les concentrations croissantes de GES dans l &apos; atmosphère avaient déjà provoqué des changements climatiques considérables, phénomène qui, selon les prévisions, s &apos; intensifierait.