- Green National Income (also known as Environmentally Adjusted Net National Income) starts with the standard National Income (Net National Income or NNI). - It then subtracts the estimated costs associated with the depletion of natural resources (e.g., deforestation, depletion of mineral reserves) and the damage caused by environmental degradation (e.g., pollution, loss of biodiversity). - The goal is to provide a more sustainable measure of economic well-being that considers the impact of economic activities on the environment and natural capital.