Help Suggestion topics for research/capstone (sustainable development)

[Reoberu]

Baka may makatulong sakin dito na makapagbibigay ng idea. Sustainable development or about making something useful composed of recycled materials kasi yung amin. Yung example na binigay ng teacher namin vacuum(gawa sa bote w/dc motor) and mop on wheels(naka remote control). Naisip ko parang roomba(vacuum on wheels) kaso parang mahirap gawin kaya naghahanap ako ng alternatives. Sana may makatulong salamat!