A Composting toilet would be ideal for our garden. It is totally waterless, and the compost can be put on the fruit trees. You need to let the compost seat for a few years before it can be used. I also have compost worms that could speed up the process. I found a place in Germany that sells a whole out house system. The sawdust you put in it makes the compost smell OK, or non stinky! We will have no water, sewage or electricity at the garden. We need self sustaining ideas. This is one idea that could really solve the toilet issue.