This document discusses the negative health impacts of pollution and highlights various ancient Indian water harvesting structures that were environmentally friendly. It notes that pollution can cause physical, psychological, and behavioral disorders in people by reducing lung function and increasing respiratory diseases. It then describes structures from Ladakh, Agra, and Rajasthan like zings, baolis, and kundis that harvested rainwater in an eco-friendly way. The document advocates learning from these ancient practices to protect the environment and enable humans to live happy and disease-free lives.