Americans, especially those born between 1966 and 1986 (largely so-called generation X), have probably suffered from an additional 151 million mental health disorders that would not have occurred without the use of leaded petrol.
U.S. researchers found that, compared to previous generations, members of Generation X and Generation Y showed poorer physical health, higher levels of unhealthy behaviors and more depression and anxiety.
For the sake of chronological order, historians and analysts use a beginning and end date for generational identification. The identification includes common behaviors and attitudes characteristic of that generation.
