This author, an environmental scientist at the Institute for Arctic and Alpine Research, University of Colorado, Boulder, compared temporal trends in U.S. autism prevalence to measurable exposure trends in the U.S. of a range of known environmental toxicants. She compared these toxicant trends to autism time trends from the California Department of Developmental Services (CDDS) and state level data collected for the Individuals with Disabilities Education Act (IDEA), using two methods to track autism prevalence by year of birth. Many common toxicants, such as lead, PCBs, some pesticides, vehicular emissions and air pollution were declining while autism prevalence was increasing. The author noted that “among the suspected toxins surveyed, polybrominated diphenyl ethers, aluminum [vaccine] adjuvants, and the herbicide glyphosate have increasing trends that correlate positively to the rise in autism.”