the health effects of foods derived from GM crops, she has said: "And I can tell you as a physician with special interest and long history in environmental health, the quality of studies that we have are not what you need. We should have a moratorium until they are proven safe, and they have not been proven safe in the way that they are used." Commentators have criticized Stein's statements about GMOs, writing that they contradict the scientific consensus, which is that existing GM foods are no less safe than foods made from conventional crops. Among the critics was Jordan Weissmann, Slate's business and economics editor, who wrote in July 2016: "Never mind that scientists have studied GMOs extensively and found no signs of danger to human health—Stein would like medical researchers to prove a negative." In Environmental Threats to Healthy Aging (2008), Stein concludes her section on pesticides by saying: "[M]any but not all studies find that acute high-dose and chronic lower-dose occupational exposures to some neurotoxic pesticides are linked to an increased risk of cognitive decline, dementia or Alzheimer's disease." In 2000, Stein and her coauthors wrote, "Twenty million American children five and under eat an average of eight pesticides every day through food consumption. Thirty-seven pesticides registered for use on foods are neurotoxic organophosphate insecticides, chemically related to more toxic nerve warfare agent developed earlier this century." They further noted the ubiquity of these pesticides in the home and at schools, citing Schettler et al. for the claim that "the trend is toward increasingly common exposures to organophosphates. For example, chlorpyrifos detections in urine increased more than tenfold from 1980 to 1990." Health effects of Wi-Fi In a question-and-answer session, Stein voiced concern about wireless internet (Wi-Fi) in schools, saying, "We should not be subjecting kids' brains especially to that ... and we don't follow this issue in our country, but in Europe, where they do, you know, they have good precautions about wireless. Maybe not good enough, you know. It's very hard to study this stuff. You know, we make guinea pigs out of whole populations and then we discover how many die." According to the World Health Organization (WHO), "no adverse health effects are expected from exposure to [Wi-Fi]". Stein later said, "take precautions about how much we expose young children to WiFi and cellphones until we know more about the long-term health effects of