I was listening to a ASK THIS OLD HOUSE episode, where they were giving suggestions for repairing a bad lawn. One of the suggestions was to put phosphate on the lawn. The thing is the show should also mention that in some areas of the country, such as some parts of Minnesota, the use of phosphate is illegal, because it damages lakes and streams. One must be careful and help the environment these days. We only have one earth-we must take care of it! Thanks!