Sentences with phrase «unknown synergistic effect»
«Even if all individual contaminants in the air had been below permissible federal safety levels, there is yet another troubling concern for many scientists, what some call the unknown synergistic effect of exposure to even low levels of a variety of toxic substances at one time.
http://www.artscraftstheatersafety.org/ Not exact matches
Studies have found that for some unknown reason the synergistic effects don't kick in for some people until they've been taking it regularly (at night) for 2 to 3 weeks.