This interactive, debate-style session tackles a timely and consequential issue for commercial real estate (CRE) and architecture, engineering, and construction (AEC) communities: the GHG Corporate Protocol’s Scope 2 emissions accounting guidance. As the GHG Protocol looks to update the 2015 Scope 2 Guidance to catalyze further investments in decarbonization and grid greening, the proposed changes - expected to be finalized around 2027 – are sparking intense discussions among industry experts and starting to shape corporate decision-making. Contemplated changes include stricter rules for market based reporting, such as mandatory hourly matching for large energy users and strengthened geographic deliverability requirements. Together, they will materially affect how organizations set, measure, and achieve climate targets. This session brings together professionals from Microsoft, LaSalle Investment Management, Watttime, and RE Tech Advisors, a sustainability advisory firm focused on CRE, to outline the intent of the updates, discuss feasibility for organizations to comply, and unpack the potential market impacts of adoption. Moderated by a world-class facilitator, Harvard professor and Villanova adjunct professor with expertise in sustainable investing, speakers will be organized into teams representing the differing viewpoints on these topics. Through debate and conversation, participants will summarize industry perspective on the proposed changes, present opportunities, risks, and tradeoffs, and examine the realworld implications for investment strategy, portfolio operations, and asset valuation. Designed to be engaging, provocative, and educational, this session is a must-attend for professionals across disciplines looking to better understand how proposed changes to Scope 2 carbon accounting guidance could impact their work. Attendees will leave with a deeper understanding of the updates, the rationale behind them, and how changes may influence their own organizations. Come prepared to learn from industry experts and develop an informed perspective on one of the most important debates shaping the future of clean energy and the built environment.