Air concentrations of a number of other pollutants identified by the international community as the most harmful to human health and the environment - fine particulates (PM25 and PM]0), volatile organic compounds (except benzo(a)pyrene), polyaromatic hydrocarbons (PAH) and persistent organic pollutants (POPs) - are not measured in Uzbekistan. Measurements of PM25 and PM|0 were started in 2009 in Karakalpakstan under a pilot project managed by Uzhydromet and the Ministry' of Health. United Nations Development Programme, 2008.