The pesticide manufacturers, now known benignly as "Croplife America," are behind the efforts to unnecessarily test chemicals on humans.
According to the PIRG release:
"In December 2004, 127 students at the University of San Diego took part in a study where they were exposed to chloropicrin, a highly hazardous insecticide which is also an active ingredient in tear gas.
One group of students in this study were placed in a "chamber" for up to one hour on four consecutive days with the vaporized toxic chemical. Another group had this chemical released directly into their nostrils and eyes."