Every day, gardeners across the world flush away a valuable and sustainable source of fertilizer for their plants -- urine. Urine is a good source of nitrogen and other minerals and, providing it is used correctly, is completely safe. Using urine as a fertilizer saves money, fossil fuels (used extensively in the production of chemical fertilizers) and water (no need to flush!). It's a standard of some organic gardens.

Using urine also cuts down on river pollution -- urine is a major source of nitrogen that contributes to river eutrophication if expensive denitrification is not used at the water treatment plant. And it's not a backwards step, it's space age technology -- NASA has used urine in hydroponics systems!