How do Japanese air quality regulations compare with those in the U.S.?



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    Japan’s Ministry of the Environment established the The Motor Vehicle NOx Law in 1992 which placed a cap on nitrogen oxides that could be emitted from cars.  The law was revised in 2001, tightening the emission standards called Automotive NOx and PM Law. Japan has similar emissions standards to the United States, both being international leaders in enforcing these laws.  The US has a method of tiers that has “decreasing emissions limits and increasing durability requirements.”

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