1993 Ehime University study on global pollutants named an environmental science milestone

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  Environmental Science & Technology selected a 1993 paper by Ehime University researchers as one of 32 milestone articles in environmental science and technology.

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  The study examined the global spread and accumulation of persistent organic pollutants, including DDT and HCH, through measurements taken during five research voyages lasting a total of 18 months.

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  Researchers detected HCH around the Arctic, where it was believed to have been seldom, if ever, used, and found it more prevalent in surface seawater than in the atmosphere.

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  The paper’s findings have informed risk assessments and provided scientific evidence for the Stockholm Convention on Persistent Organic Pollutants, which took effect in 2004.

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  The paper has been cited in more than 1,300 research papers and academic books, and continues to receive 20 to 30 citations a year.

Who

Ehime University professor Hisato Iwata and his colleagues

What

Their 1993 paper on the global spread of persistent organic pollutants was selected as a milestone article.

When

The paper was published in 1993; the journal selected it in 2026.

Where

Ehime University in western Japan; the study examined pollution around the world.

Why

The paper advanced understanding of how persistent organic pollutants travel and accumulate globally and contributed scientific evidence used in risk assessments and an international treaty.

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