A cabinet decision first established environmental quality standards for sulfur oxides in February 1969.
Sources
- Compendium of Reference Materials on the Basis for Establishment of Environmental Quality Standards in Japan (nies.go.jp)
- https://www.env.go.jp/press/110926.html (env.go.jp)
- https://www.erca.go.jp/yobou/taiki/rekishi/03_03.html (erca.go.jp)
- https://www.erca.go.jp/yobou/taiki/rekishi/03_10.html (erca.go.jp)
- https://journal.jogmec.go.jp/oilgas/termsearch/list/ai/sulfur-oxides.html (journal.jogmec.go.jp)
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