become more expensive

The products have become more expensive and also hard to obtain.

Les produits sont devenus plus coûteux et leur disponibilité reste souvent déficiente.

The assertion that renewable energy could become more expensive is wrong.

Il est faux d’affirmer que les énergies renouvelables pourraient devenir plus coûteuses.

However, I have to disagree with the impression given that food has become more expensive.

Cependant, je suis contre l'impression donnée selon laquelle les denrées alimentaires sont devenues plus chères.