The committee was tasked to examine potential approaches, along with their relative merits and challenges, for a comprehensive update to the current methodology for estimating the social cost of carbon (SC-CO2) across a range of assumptions about future socioeconomic and physical earth systems . The task was to ensure that the SC-CO2 estimates reflect the best available science, focusing on issues related to the choice of models and damage functions, climate science modeling assumptions, socioeconomic and emissions scenarios, presentation of uncertainty, and discounting.