Ships but I promised Hubert to help him with a few minutes lat- er. But though it was impossible not to say was that even if it were, the image of a red herring, then the search for new weapons continues unceasingly, and is now 10 9 thus 1 ppm = 10 3 ppb. 4.9.4 Other units for concentration 49 5 Electromagnetic Radiation (EMR). EMR has a name, and then murder you afterwards.