Interviews with more than two dozen experts on pesticide regulation including 14 who worked at the EPA's Office of Pesticide Programs, or OPP " described a federal environmental agency that is often unable to stand up to the intense pressures from powerful agrochemical companies, which spend tens of millions of dollars on lobbying each year and employ many former EPA scientists once they leave the agency. The enormous corporate influence has weakened and, in some cases, shut down the meaningful regulation of pesticides in the U.S. and left the country's residents exposed to levels of dangerous chemicals not tolerated in many other nations. This reporting has brought to light several instances in which the overlooking, burying, or scuttling of science has had direct consequences for human health. The alarming discoveries include an EPA report warning about the link between the pesticide glyphosate and cancer that never saw the light of day; the failure to consider evidence that a neonicotinoid pesticide causes brain damage; the refusal to investigate evidence that another pesticide that is an ingredient in Roundup may cause cancer ... and the agency's waiving of the vast majority of toxicity tests at the request of industry. The scientists who have identified these hazards described immense pressure from within the agency to overlook the risks they found. And several said they faced retribution for calling attention to the dangers of pesticides.