The onset of puberty in American girls occurs significantly earlier than in the past, estimated at six years earlier than in 1900, with average ages between 10 and 13. This trend has emerged as the highest in the world, largely attributed to the presence of xenoestrogens found in plastics and pesticides, such as atrazine. Atrazine, heavily used in the US but banned in Europe, is shown to possess potent endocrine-disrupting effects, capable of inducing sex changes in developing organisms. The influence of such chemicals is profound, challenging the validity of scientific studies, many of which are funded by industries with vested interests, leading to potentially misleading conclusions about safety. Furthermore, the discussions around rising rates of transgender identities suggest complex interplays of these environmental factors and social dynamics over recent years.