Okay. You've both taken me now to my next question. Thank you. It is with respect to the advantages and disadvantages or problems with substitutes.
Mr. Cullen brought up these 14 substitutes. And along his line of questioning when he talked about manufacturing, manufacturing in these chemicals causes cancer. I presume that if we use them in these other products they're a manufactured product and there is a chance that they could also cause cancer. Is that not true?