I have one question. During your presentation you said that one of the things that had changed since CEPA was first brought in was a greater sensitivity in measurement of toxins to the point you could do trace elements and you could find things that you couldn't find before. Has there been a corresponding increase in understanding of exactly what the risk factors are? In other words, do we have a better sense, for example, of respiratory disease, and what causes what, than we do of carcinogens? Is our knowledge of what causes what on the human health side keeping pace with our ability to measure increasingly small particles of noxious things?
