Principles and Concepts
w One form of a substance can have very different
effects from another.
w                            Elemental Mercury
w                                       air
w                                       Bodies of Water
w                                                         (bacteria)
w                                       Methylmercury
w Methylmercury       fish       people      significant health effects
w                                                                 (all routes; neurotoxic)
N5290, Sept. 27, 2004