concentrations required to kill half the animals exposed to a given pol- 

 lutant. Rather than support more of those kinds of studies, the IDOE 

 program will focus on the effects of pollutants on the life processes of 

 organisms — breeding, feeding, respiration, reproduction, etc. — so that the 

 effects may be detected and predicted long before concentrations sufficient 

 to cause death are reached. 



Fate of Pollutants 



Knowledge of the half life of most manmade pollutants in the oceans 

 is almost nonexistent. The processes, if any, responsible for their ultimate 

 removal or transformation to a harmless form are equally unknown. 

 Studies to identify these processes will be undertaken. 



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