Pediatricians and pediatric trainees in North America are increasingly involved in caring for children and adolescents in or from low- and middle-income countries (LMICs). In many LMICs, hazardous environmental exposures-notably outdoor and household air pollution, water pollution, lead, pesticides, and other manufactured chemicals-are highly prevalent and account for twice the proportion of disease and deaths among young children as in North America. Climate change will likely worsen these exposures. It is important that pediatricians and other pediatric health professionals from high-income countries who work in LMICs be aware of the disproportionately severe impacts of toxic environmental hazards, become knowledgeable about the major local/regional environmental threats, and consider environmental factors in their differential diagnoses. Likewise, pediatricians in high-income countries who care for patients who have emigrated from LMICs need to be aware that these children may be at elevated risk of toxic environmental diseases from past exposures to toxic environmental hazards in their countries of origin as well as ongoing exposures in products imported from their home countries, including traditional foods, medications, and cosmetics. Because diseases of toxic environmental origin seldom have unique physical signatures, pediatricians can utilize the environmental screening history, supplemented by laboratory testing, as a diagnostic tool. To prepare pediatricians to care for children in and from LMICs, pediatric organizations could increase the amount of environmental health and climate change content offered in continuing medical education (CME) credits, maintenance of certification (MOC) credits, and certification and recertification examinations. Broadly, it is important that governments and international agencies increase resources directed to pollution prevention, strengthen the environmental health workforce, and expand public health infrastructure in all countries.
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