evidence now that there are sewage treatment processes available 
that are both cost-effective and technologically reliable. So, for 
at least the point sources, it looks like we do have a chance of 
limiting the amount of nitrogen entering the system. I open that 
to debate in the management community, and I hope that serious 
consideration is given to it there. 
With regard to non-point sources of nitrogen, it is possible 
that we can do something to reduce nitrogen inputs. I'm a very 
strong proponent of the concept of the critical areas zoning that 
has been legislated in Maryland; this legislation and resulting 
regulation call for set-backs and other things that might be done 
to help reduce the non-point source inputs. 
So I think that with set-backs, best-management practices of 
farms, judicious application of fertilizers by homeowners, proper 
construction practices, etc., we can make some inroads in the 
nitrogen control situation. 
I think with that I will stop my talk and take one or two 
questions before we have to move on to the next speaker. 
Thank you. 
Dr. D'Elia: The next speaker is Jay Taft of Harvard 
University, who with Tom Malone, is going to discuss the anoxia 
problem in the Chesapeake Bay, what we know about it and what we 
can conceivably do about it. So, Jay Taft? 
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