Diesel emissions are a known cause of lung cancer and are linked to asthma and other health problems. Children can be more vulnerable to harm from diesel emissions. Children can be exposed to diesel emissions in school and child care settings, on buses, in loading zones and adjacent playgrounds, and by breathing contaminated indoor air. There are many ways to protect kids from diesel emissions, from establishing no-idling zones, to replacing older buses, to reducing the infiltration of diesel bus and other vehicle emissions into schools by ensuring that high ventilation periods do not occur during busy loading/unloading times or rush hour.