Translation of "Utilize" in French

That's going to just change the way we utilize this energy?

notre consommation d'énergie ?

His plan was to utilize his superior cavalry to overwhelm the Byzantine flanks

Son plan était d'utiliser sa cavalerie supérieure submerger les flancs byzantins

There is a tendency to utilize underground space for the less ornamental purposes of civilization.

Il y a une tendance à employer l'espace souterrain pour les fins les moins ornementales de la civilisation.