Question to the Department for Environment, Food and Rural Affairs:

To ask the Secretary of State for Environment, Food and Rural Affairs, what assessment he has made of the wind speed required to disperse (a) PM 0.1 and (b) PM 1 particles from the place where they are emitted.

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.

This report is available at https://uk-ir.defra.gov.uk/library/reports.php?report_id=968