Translate the following English sentence to French:
"As has already been mentioned here, there are indications - no proof, but clear indications - that the increase in storms world-wide has to do with the climate catastrophe."
On l'a déjà signalé ; des indices existent, pas des preuves mais des indices clairs, qui laissent à penser que l'augmentation des tempêtes à l'échelle mondiale est liée à la catastrophe climatique.