Our project would use already purchased premises for houses and thus become economically advantageous, because wastewater treatment plants are very often relatively large. Large premises of wastewater treatment plants cause economic and economical disadvantage of these wastewater treatment plants. Our project would include underwater wastewater treatment plants. These wastewater treatment plants would be very small. Therefore, our project would also not require the purchase of new premises for wastewater treatment plants and would also not occupy parts of the ecosystems. Our project would also slightly reduce the need to build new dams, as the wastewater treatment plant would also include a water treatment plant and a water testing mechanism that would detect toxins and pH. However, our project required innovation, because as he mentioned, it would have to be very small. Our goal is to develop a system that would be economically and also ecologically advantageous.