Environmental health is a vital branch of public health dedicated to understanding and managing all aspects of the natural and built environment that influence human well-being. The World Health Organization (WHO) has progressively defined this field since 1989, emphasizing the assessment and control of physical, chemical, and biological factors that affect health, from direct pathological effects to indirect impacts of urban development and housing. A key area is pediatric environmental health, which specifically studies how early life exposures uniquely influence children's development, acknowledging their distinct vulnerabilities compared to adults. This interdisciplinary field integrates toxicology, epidemiology, and environmental law to prevent disease and foster health-supportive environments globally.