The complexity of children’s environmental health (CEH) issues is compounded by the combination of legacy environmental issues, such as water quality and sanitation service delivery, with modern challenges such as transboundary contamination by persistent toxic substances, ozone depletion and hence ultraviolet and ionising radiation, global climate change, and exposure to endocrine-disrupting chemicals). For children in developing countries, the presence of all such risks represent a ‘triple burden of disease’ – a high level of communicable diseases, the increasingly severe burden of non-communicable diseases, and emerging risks from new diseases and additional stressors from the social and physical environment. .