1. W.H. Organization, 2021. WHO global air quality guidelines. Particulate matter (PM2.5 and PM10). ozone, nitrogen dioxide, sulfur dioxide and carbon monoxide.
2. Ministry of the Environment, 2009. Environmental Quality Standards in Japan - Air Quality Air & Transportation Website. https://www.env.go.jp/en/air/aq/aq.html.
3. Air pollution trends in japan between 1970 and 2012 and impact of urban air pollution countermeasures;Wakamatsu;Asian J Atmos Environ,2013
4. Polluted brain.science;Underwood;Science,2017
5. Heavy metal toxicity and the environment;Tchounwou;Exp Suppl,2012