> A 2021 study by the Centers for Disease Control and Prevention in the US found blood levels in children aged one to five years fell from 15.2 to 0.83 microgra

> A 2021 study by the Centers for Disease Control and Prevention in the US found blood levels in children aged one to five years fell from 15.2 to 0.83 micrograms per decilitre between the late 1970s and 2016 as leaded fuels were banned. So if my generation had lead levels 3-4 X higher than Roman kids, does this explain the “Exams are getting easier” meme - that exams are staying the same, but kids really are getting smarter … ( also the hey exams were waaay harder in the Edwardian Era meme?)