204 
food chain. Some metals that are quite toxic will not be taken up in 
the food chain and, therefore, do not represent a hazard. 
This is why I suggested there should be a panel of experts to look 
at the whole problem, because it is much more serious if toxic things 
are multiplied in the food chain, as in the example I cited of mercury 
being multiplied in the human being in the kidneys and the liver. 
DDT, we know, is multiplied by the food chain. This is much more 
serious than something that goes out and maybe is diffused. There are 
these differences in the chemicals and thermal pollution. 
Mr. Kerre. Thank you, Mr. Chairman. 
Mr. Dinesty. Thank you very much, Mr. Keith. 
- Doctor, the committee is most grateful to you for your statement. 
Could you give us, at your convenience, a complete list of the chem- 
icals that ought not to be tolerated in the marine environment by rea- 
son of being absorbed into the food chain because they become complex 
organic substances ? 
Dr. Hunt. I will try to provide you with a list based on our present 
knowledge. 
Mr. Dinertt. Your knowledge is far superior to that of the Chair. 
Mr. Harrington and Mr. Moakley and Dr. Hunt, we are grateful 
to you for your very helpful testimony and for your participation in 
our hearings. I assure you that the committee will try to move for- 
ward vigorously, taking careful consideration of your very helpful 
recommendations to us. 
Gentlemen, I wish to commend all three of you and express my 
thanks to you. 
If there is no further business to come before the Chair at this time, 
the committee will stand adjourned until the call of the Chair. 
(Whereupon, at 3:30 p.m., the subcommittee adjourned, subject to 
the call of the Chair.) 
