This pilot of the Environment and Gender Index aims to measure country performance at the intersection of gender, environment, and sustainable development. Socially constructed determinants can contribute to women’s disempowerment. For example: insecure land and tenure rights; obstructed access to natural resource assets; limited opportunities for participating in decision-making; lack of access to markets, capital, training, and technologies; and the double burden of responsibilities inside and outside the household. This results in a lost opportunity for sustainable development.