Their annual report has an interesting section on sustainability, showcasing some serious data gathering at a national level!
https://en.arcep.fr/uploads/tx_gspublication/ARCEP-RA2025-TOME_3-UK-Norme_A.pdf
In particular, they show steady increases in carbon footprint, energy usage and water consumption from data centres… particularly interesting as France has low carbon electricity, but unsurprisingly this is not enough to balance rebound effects!
