Professor Hess says a major value of sustainable agriculture is making good use of what you have.

VOA: special.2009.04.14

He said,"What is the use of being elected or re-elected, if you don't stand for something."

VOA: special.2010.05.20

"So what that means is, in terms of cost, is you can use And that's potentially very significant."

VOA: standard.2010.02.19