Sanitation is important for managing human waste properly. The way we handle waste after it leaves the toilet can impact the environment, society, and health. Sanitation systems that allow for the reuse of human waste may have bigger effects on society than those that don't. To make sanitation sustainable, we need to consider the material, socio-cultural, and health impacts. Designing sanitation systems usually focuses on optimizing these impacts, but it's important to also consider the needs and preferences of different stakeholders. Building relationships with stakeholders can help make sanitation more sustainable in the long run.