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)
• PAHs
• Particulate matter (PM10)
• Percentile
• POPS
• ppb

Parts per billion. The concentration of a pollutant in air in terms of volume ratio. A concentration of 1 ppb means that for every billion (10⁹) units of air, there is one unit of pollutant present.

• ppm
• Running mean
• Sulphur Dioxide (SO2)
• TEOM
• TOMPS
• Trajectory Model
• Volatile organic compounds (VOCs)
• Zones and Agglomerations