While telling us for decades now that 'small particle air pollution' is the greatest health threat ever (this started before AGW obviously) the EPA sponsored human experiments. Unwitting people were exposed to these particles in tests, including children and the elderly.
When caught in 2010, it took until 2016 for the EPA to conduct an 'investigation. One which primarily looked only at the defense, not the accusations. 13 of the 19 'council members' belonged to companies or organizations which received millions in EPA grants. A complete whitewash utterly ignored by the MSM when the report was released on March 28, 2017. But you can trust big