Threats to Sustainable Use
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•   The annual phosphorus load to Lake Ohrid is estimated at 240 t/y, 154 of which is in dissolved form, readly available to the algae. 
•    More  than 30% of the dissolved phosphorus originates from the rivers and the springs, that is, form non-point sources of pollution.
  The eutrophication is     
   the main transboundary   
   problem at lake Ohrid.