This blog will analyze the relationship between agriculture, food supply, and wet waste disposal/reuse in subsistence urbanities.
Another specific case is that of Grace Mambo, who as a result of being diagnosed with diabetes wished to eat healthier. However, healthy diets are out of normal budgetary constraints for most inhabitants of Harare. As a result, she began growing lettuce, beetroot and leaks in a neaby vacant lot.1 Recently she quit her job to sell excess produce to restaurants and grocery stores. She has gardens strewn throughout her neighbourhood, and access to a healthy diet.
In the city of Haroonabad, Pakistan, Urban waste water is a valuable resource for agriculture, and is used for approximately 80% of crop growing. This is due to the absence and high cost of clean water, as well as waste waters proximity reliabilty, and high nutrient value. The gross income of a wastewater farmer is significantly higher than that of a clean water farmer. The crops gorwn are mainly crops that are cooked before eating, such as cauliflower, cotton, spinach, wheat, and tomatoes, minimizing any health effects for consumers.4 Waste water agriculture is a more economical alternative to in developing countries, and is also ecologically responsible as well, since it cuts the quantity of municipal and industrial waste in lakes and streams.4
If the residents of Harare were to implement the use of greywater, or possibly (although more health risks are involved for the farmers) waste water, they could cut down on the need for wet waste disposal, and would see an incrrease in their agricultural production, income, and food surplus, due to reduced water costs and better access.
2. Emaculate Madungwe, "Grey Water Use: A Strategy for Water Demand in Harare?", August 3, 2007, http://www.sciencedirect.com/ (accessed November 3, 2009).
3. "Reuse of Waste Water for Agriculture," http://www.iwmi.cyiar.org/ (accessed November 3, 2009)
4. William Van der Hoake, "Waste Water Use In Pakistan: the Cases of Haroonabad and Faisalabad," http://www.idic.ca/ (accessed November 3, 2009)