A meta-analysis of studies on the maximum sustainable human population on earth found the median estimate to be 7.7 billion people1. Earth's current human population is about 7.5 billion and is forecasted to exceed 7.7 billion in 20202. Population limits are heavily influenced by lifestyle and resource usage. How would a globally widespread* plant-based diet influence the population limit for humans on earth?
* such that we can assume 100% of the population follows such a diet in estimates and calculations