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Environmental information systems
AAQD: Ambient air quality directive
AEI: average exposure indicator
ALV: annual limit value
AQ: air quality
AQG: air quality guidance
C6H6: benzene
CO: carbon monoxide
BaP: benzo(a)pyrene
EEA: European Environment Agency
ECO: exposure concentration obligation
ETC HE: European Topic Centre on Human Health and the Environment
EU: European Union
EU-27: the 27 Member States of the European Union
HLV: hourly limit value
LV: limit value
mg/m3: miligram per cubic meter
MITECO: Ministry for the Ecological Transition and the Demographic Challenge
NERT: national exposure reduction target
NO2: nitrogen dioxide
ng/m3: nanogram per cubic meter
O3: tropospheric ozone
PM: particulate matter
PM10: particulate matter with a diameter of 10µm or less
PM2.5: particulate matter with a diameter of 2.5µm or less, also known as fine particulate matter.
SO2: sulphur dioxide
TV: target value
UFP: ultrafine particles
UNSCR 1244/99: United Nations Security Council Resolution 1244 (1999)
UTD: Up-to-date
VOC: volatile organic compound
WHO: World Health Organization
µg/m3: microgram per cubic meter