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The Air Quality Index (AQI) is a standardized index of the air quality in a given location, given in parts per billion. It measures mainly ground-level ozone and particulates (except the pollen count), but may also include sulphur dioxide, nitrogen dioxide. Various agencies around the world measure such indices, though definitions may change between places. It has been suggested that Areas of Edinburgh be merged into this article or section. ...
Scotland (Alba in Scottish Gaelic) is a country in northwest Europe and a constituent nation of the United Kingdom. ...
The word standard has several meanings: Classically, standard referred to a flag or banner; especially, a national or other ensign carried into battle; thus standard bearer indicates the one who bears, or carries, the standard. ...
Look up Index in Wiktionary, the free dictionary Index can be defined as: an ordered list, plural indexes a number or variable, plural indices. ...
Air is a name for the mixture of gases present in the Earths atmosphere. ...
Quality refers to the inherent or distinctive characteristics or properties of a person, object, process or other thing. ...
This page refers to concentration in the chemical sense. ...
Ozone (O3) in the troposphere, is a pollutant, a constituent of smog. ...
Particulates, alternately referred to as Particulate Matter (PM), aerosols or fine particles are tiny particles of solid or liquid suspended in the air. ...
Pollen count is the measurement of the number of grains of pollen in a cubic meter of air. ...
Sulfur dioxide (or Sulphur dioxide) has the chemical formula SO2. ...
The chemical compound nitrogen dioxide (NO2) is a red or orange/brown gas with a characteristic sharp, biting odor. ...
The U.S. Environmental Protection Agency and the Meteorological Service of Canada differ on what AQI categories are used: For other uses, see United States (disambiguation) and US (disambiguation). ...
EPA redirects here. ...
The Meteorological Service of Canada (MSC) is a Canadian government agency which provides meteorological information. ...
Categories used by the EPA:
- 0-50: Good (green)
- 51-100: Moderate (yellow)
- 101-150: Unhealthy for sensitive groups (orange)
- 151-200: Unhealthy (red)
- 201-300: Very unhealthy (purple)
- 301-500: Hazardous (maroon)
Categories used by the MSC: - 0-25*: Good (green)
- 26*-50: Moderate (yellow)
- 51-100: Poor (orange/red)
- 101+: Very poor (purple)
In Ontario, 31 is the upper limit for good and 32 the lower limit for moderate. Motto: Ut Incepit Fidelis Sic Permanet (Loyal it began, loyal it remains) Other Canadian provinces and territories Capital Toronto Largest city Toronto Lieutenant Governor James K. Bartleman Premier Dalton McGuinty (Liberal) Area 1,076,395 km² (4th) - Land 917,741 km² - Water 158,654 km² (14. ...
The AQI can worsen (go up) due to stagnant air, often caused by an anticyclone or temperature inversion, or other lack of winds. On these days, the news media may ask the public to carpool or use public transport, or take other measures such as teleworking. In meteorology, an anticyclone is a weather phenomenon associated with atmospheric high pressure. ...
A temperature inversion is a meteorological phenomenon where air temperature increases with height. ...
Wind is the quasi-horizontal movement of air (as opposed to an air current) caused by a horizontal pressure gradient force. ...
News is essentially new information or current events. ...
Public is of or pertaining to the people; belonging to the people; relating to, or affecting, a nation, state, or community; opposed to private; as, the public treasury, a road or lake. ...
Carpooling is shared use of a car, in particular for commuting to work, often by people who each have a car but travel together to save costs. ...
Skytrain Bangkok. ...
Telework (known in the USA as Telecommuting) (also e-work) is work performed from a distance, typically over a network such as the Internet, as opposed to work performed directly on site. ...
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