A code book and corresponding dataset produced by the London School of Hygiene and Tropical Medicine. Data features survey responses from 3,222 young people, parents of children, and expectant parents from around the world. This survey was administered to help understand the perspectives of young people in cities effected by air pollution. This research took place during the first phase of research completed by the Children, Cities and Climate Action Lab in 2021. Supplementary material includes methods and some summarized survey statistics.