As I said before, the UN is trying to control the dialogue on sustainable development just as they try to control the dialogue on other issues, such as world peace and ending hunger. This doesn't mean the concept itself is their creation or the dialogue within the idea is controlled by them.
For the most part, when discussing sustainability, we discuss problems and solutions. Most of the solutions have nothing to do with government. And within those solutions that do, I can't think of any that involve the federal government. Local government can be useful in some areas, but thats a whole different debate. My point is, as long as we don't take orders from the UN or some other international entity, the implementation sustainable development is very much in the hands of individuals.