De Wit Sustainable Options (Pty) Ltd is a South African based firm directed by Prof. Martin de Wit, an environmental and natural resources economist with 20 years of experience in analysing and responding to natural and environmental risks, costs and opportunities. The purpose of De Wit Sustainable Options (Pty) Ltd is to describe, measure and quantify environmental risks, liabilities and opportunities in support of responsible decision making at business, government and household level. In short, first to measure for more effective management, but also to manage for an increased quality of life of all those affected.