Industrial and social design researcher Lotte Kristoferitsch explores how design can tackle global challenges through impact-driven projects, particularly in the fields of water, sanitation, and hygiene. Drawing on her work with EOOS Social Design and the Gates Foundation, she examines how human-behavior research, such as analyzing urine flows and handwashing habits, can lead to innovative, resource-efficient solutions like urine-separating dry toilets and sustainable handwashing faucets. Kristoferitsch highlights how addressing basic human needs through inclusive, cross-cultural design can close nutrient cycles, empower vulnerable communities, and create meaningful, real-world impact beyond traditional commercial product development.