Human urine is an excellent fertiliser. It has roughly the same composition of fertilizing elements as liquid fertilizer used for potted plants, However it is normally flushed away instead of being put to use. Safe methods for using urine to nourish plants are now well documented, particularly in Sweden. Several research institutions and Stockholm's water authority have studied the sociology, bacteriology, and viability of collecting urine and applying it to grain crops.

The Towa may spearhead a behavioural change that is needed to use human urine as a resource. The special opportunity is economically and environmentally interested persons to use urine as fertiliser in their own gardens. This will avoid the the most common detrimental life-cycle for human urine.

The most common life-cycle for urine after release from the human body starts by flowing to wastewater treatment plants or to septic systems (among other places). These discharge it to the soil, groundwater, streams, lakes, rivers, or seas -- often with much of the nitrogen intact. In lakes and other surface waters, aquatic plants and algae consume the nitrogen, resulting in a great bloom of growth. When this growth dies and decomposes, it pulls oxygen from the water -- which can suffocate fish and other aquatic life. Underground, nitrogen can seep into drinking water, posing a potential health hazard. At the same time, farmers worldwide purchase tons of nitrogen fertilizer, much of it from industrial fertilizer factories that produce it with imported energy.

Managing wastewater is expensive. In coastal and other environmentally sensitive areas it is all the more important that the issue is porperly handled.