Diets for a Better Future investigates current food consumption patterns and the efficacy of national dietary guidelines in G20 countries compared to the Planetary Health Diet. It also explores the potential for reducing greenhouse gas emissions by shifting toward more healthy and sustainable diets and how this could lead to a more equitable distribution of the global “carbon budget” for food. The modeling used in this report is part of an academic research paper titled, The healthiness and sustainability of national and global food-based dietary guidelines (Springmann et al. 2020).