I'm liking what vektor and shogun are saying. Only thing about veggies and fruits is the inputs to these. Do you guys eat organic? I prefer to grow my own but this is hard to do in the city. My greenhouse is only 10 square metres but it keeps us in spinach, lettuce, tomatoes and snap pees most of the year with only 5 minutes of power an hour to run a pump. It is half underground and insulated on the north and south end. Plants are fine up to about -25 outside with no heater.
Beats eating pooh:
Sewage sludge application
In Alberta it is common practice to apply sludge or biosolids to agricultural lands as a nutrient source, however this must be done in accordance with standards and guidelines developed by Alberta Environment.
Challenges and benefits
The issues and benefits associated with this type of application are extensive, as are its benefits. Issues involve contamination of the receiving soils with metals, chemicals, drugs and pharmaceuticals, as well as changes to soil properties and chemistry, from repeated applications. The benefits of sewage sludge application are its nutrient value and its use as a soil amendment rather than burning or landfilling it. The
Guidelines for the Application of Municipal Wastewater Sludges to Agricultural Lands are well-established, designed to maximize benefits and reduce potential hazards.
There's more if you want to keep reading:
http://environment.alberta.ca/02194.html