Ask your insurer for the Energy and Climate Act's "Article 29 report": since 2022, it has required publication of the carbon footprint and climate alignment of investment options. For a multi-option policy, the footprint depends on your chosen allocation between euro funds and unit-linked investments. Without a precise figure, use this article's indicative figures: ~175 tCO₂e/M€ for the euro fund and each ETF's published intensity (through the PAI report) for unit-linked investments.
Read the source article: Livret A, life insurance, PEA: what carbon footprint?