OIG report. A group of leading EPA scientists sent a letter to the chief administrator, Stephen Johnson, decrying the lack of developmental neurotoxicity data in the review process. EPA Letter EHP article New studies have shown toxicity to developing organisms during certain "critical periods" at doses much lower than those previously suspected to cause harm.Even the restrictions which did successfully pass have been controversial. For example, in 1999 the EPA restricted the use of chlorpyrifos in households (under the commercial name Dursban). However, the EPA did not limit its use in agriculture. Chlorpyrifos remains one of the most widely used pesticides. This may soon change. On February 8, 2013, the EPA requested comment on a preliminary evaluation of the potential risks to children and other bystanders from volatilization of chlorpyrifos from treated crops

Vulnerable groups
Some populations are more vulnerable to pesticide poisoning. In the United States, farmworkers can be exposed via direct spray, drift, spills, direct contact with treated crops or soil, or defective or missing protective equipment. Migrant workers may be at an especially high risk of chronic exposure as over the course of a growing season, they may work at multiple farms, thus increasing their exposure to pesticides. Farmworkers in more permanent positions may receive more safety training and/or more "consistent reinforcement of safety behaviors than seasonal farmworkers or day laborers."
Despite continually denying responsibility for the attack, Russia is suspected to be behind the poisonings. Alexei Navalny

On 20 August 2020, Russian politician Alexei Navalny developed life-threatening acute poisoning symptoms on a flight. He was later transferred to Berlin, where poisoning by a cholinesterase inhibitor was diagnosed and confirmed by multiple tests in independent laboratories. == References ==