Economics of ecological engineering has been demonstrated using energy principles for a wetland., and using nutrient valuation for a dairy farm== Literature ==* Howard T. Odum (1963), "Man and Ecosystem" Proceedings, Lockwood Conference on the Suburban Forest and Ecology, in: "Bulletin Connecticut Agric.
* Howard T. Odum (1963), "Man and Ecosystem" Proceedings, Lockwood Conference on the Suburban Forest and Ecology, in: "Bulletin Connecticut Agric.