Eco-friendly and economical way to resolve sanitation amd sewage issues

According to the  WHO report most of the under developed and developing countries are in the clutches of waterborne disease and its main cause is poor sanitation. Today, the world need modern, efficient and eco-friendly way to tackle sanitation need of the word. Be smart and eco-friendly,  reuse water and use sludge as a fertilizer and make this world a healthy place for all.