The letter comes at a critical juncture, ahead of the EU’s legislative simplification package slated for February 2025. It underscores the urgent need to integrate scientific rigor into the EU’s corporate sustainability reporting framework, aiming to balance streamlined disclosures with high-quality, actionable data. This is a call to legislators and corporate leaders: collaborate with the scientific community to build a reporting framework that is robust, streamlined, and transformative. Key points from the letter include:• The call for science-based sustainability reporting to enhance data relevance and reduce reporting burdens. • Prioritization of key environmental impacts, like carbon emissions and water use, even if not immediately material to individual companies.