Buttercrunch bib lettuce and Italian large leaf basil are almost ready to harvest in an Iowa State greenhouse where students are working with extension specialist Allen Pattillo. Thanks to a special project grant from the Leopold Center's Cross-cutting Initiative, Pattillo has set up an experiment that explores the use of aquaponics -- the combination of aquaculture and hydroponics to produce an efficient and economically/ecologically viable form of agriculture. In this system he raises Nile tilapia in the recirculating water used to grow the lettuce and basil. More about this project