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<p>In 2018 the Government commissioned the Air Quality Expert Group to write a detailed
report on ultrafine particles, which include PM 0.1 and PM 1.0. This report describes
extensive research assessing the factors that affect the formation and dispersion
of PM0.1 and PM1.0, including wind speed.</p><p> </p><p>This report is available at
<a href="https://uk-ir.defra.gov.uk/library/reports.php?report_id=968" target="_blank">https://uk-ir.defra.gov.uk/library/reports.php?report_id=968</a></p>
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