I think that's true, and I think that's partly why all the witnesses here today are talking about separating these things out, drawing clear lines of cause and effect, and establishing the most appropriate measures--targets and compliance measures--for each. Although they're interconnected, they act on human health differently. You can be more or less aggressive on various elements that contribute to each. So I think that's correct.
On February 13th, 2007. See this statement in context.