According to the WHO, over three million children die every year due to unhealthy environments. This atlas, published in 2004 explores issues as diverse as the devastating and largely unknown impact of indoor air pollution, the unfashionable yet huge tragedy of sanitation, and complex emerging issues like climate change. It contains full-colour maps and graphics that clearly demonstrate the threats that children face and underscore the impact of poverty on children’s health. While this crisis cannot be ignored and demands urgent action, success stories, such as the Montreal Protocol, show a way forward for the world to make sure that our children will inherit a safer planet and a brighter future.