Three hundred million children worldwide live in places where the air is toxic, exceeding by at least a factor of six the World Health Organization's limits on particulate matter per cubic meter, a report from UNICEF finds. According to the report, Clear the Air for Children: The Impact of Air Pollution on Children (100 pages, PDF), air pollution was linked to one of every eight deaths globally in 2012; can have serious effects on children's health and development, with lifelong implications; and disproportionately affects children in low- and middle-income countries. Reducing air pollution, on the other hand, can significantly boost economic productivity and performance through improved health and cognitive and physical development, reduce healthcare expenditures, and boost incomes — and is critical to making progress on the UN's Sustainable Development Goals. To that end, the report calls for more investment in raising awareness of the negative effects of air pollution, measures to reduce fossil fuel emissions, alternative sources of energy, and better monitoring of air pollution levels.