Waste generation
"she adopted the technique of vermicomposting — the cultivation of worms to consume and decompose sewage waste. This forms the top-most layer of a bio-filter that lets the water pass through different layers of wood, sand and carbon, filtering the water in an eco-friendly manner. In final filtration stage the water is passed through a membrane, segregating contaminated water from clean, drinkable water."
Manufacturing Capacity: c) Sub-contracting, e) Franchising
Problem Scale: worldwide