Glossary of Terms

• 1,3-Butadiene (C4H6)
• Acid Deposition
• Acid Rain
• Air Pollution Bandings
• Air Pollution Bulletins
• Air Pollution Index
• Air Pollution Information Service
• Air Quality Management Area (AQMA)
• Air Quality Objectives
• Air Quality Standards
• Air Quality Strategy
• Ambient Air
• Annual Mean
• Automatic Monitoring
• BAM (Beta Attenuation Mass Monitor)
• Benzene (C6H6)
• Black Smoke
• Carbon Monoxide (CO)
• COMEAP
• Data Capture
• Days with Exceedences
• Diffusion Tube Samplers
• Dispersion model
• EMEP (Co-operative Programme for Monitoring and Evaluation of the Long-Range Transmission ofAir pollutants in Europe)
• Emission Factor
• Emission Inventories
• EPAQS

• EU Directives
• Exceedence
• Global Warming
• Gravimetric Equivalent PM10 Data
• Greenhouse Gases
• Hydrocarbons
• Local Air Quality Action Plan
• Local Air Quality Management (LAQM)
• Maximum hourly average
• Microgrammes per cubic metre (µg/m³)
• National Atmospheric Emissions Inventory (NAEI).
• National Statistics
• Oxides of Nitrogen (NOx)
• Ozone (O3)

Ozone (O3) is not emitted directly into the atmosphere, but is a secondary pollutant produced by reaction between nitrogen dioxide (NO2), hydrocarbons and sunlight. Whereas nitrogen dioxide (NO2) acts as a source of ozone, nitrogen oxide (NO) destroys ozone acting as a local sink. For this reason, ozone levels are not as high in urban areas (where high levels of NO are emitted from vehicles) as in rural areas. Ozone levels are usually highest in rural areas, particularly in hot, still, sunny weather conditions giving rise to "summer smog".

• PAHs
• Particulate matter (PM10)
• Percentile
• POPS
• ppb
• ppm
• Running mean
• Sulphur Dioxide (SO2)
• TEOM
• TOMPS
• Trajectory Model
• Volatile organic compounds (VOCs)
• Zones and Agglomerations