-- Select a pollutant -- 1,2-Dichloroethane Ammonia (total) Arsenic (and its compounds) Carbon monoxide Copper (and its compounds) Dioxins and furans - total Greenhouse gases (GHGs in eCO2) Hexachlorobenzene Hexavalent chromium (and its compounds) Hydrochloric acid Lead (and its compounds) Mercury (and its compounds) Methanol Methyl ethyl ketone Methyl isobutyl ketone Nitrogen oxides (expressed as nitrogen dioxide) Phenol (and its salts) PM10 - Particulate Matter <= 10 Micrometers PM2.5 - Particulate Matter <= 2.5 Micrometers Sulphur dioxide Sulphuric acid Toluene Total particulate matter Volatile Organic Compounds (Total) Zinc (and its compounds)