Air quality index - a number for reporting air
quality.The numbers range from 0
- parts per million.The higher the index, the more harmful it is for the environment.
Atmosphere - the whole mass of air surrounding the
earth.
Control strategy - a number targeted towards improving
ozone (0.1200 ppmís).
Design ratio - a quotient representing the number of
VOCís to the number of NOx ës to reduce ozone.
Emissions - substances discharged into the air by
smokestacks or gasoline engines mainly vehicles.
EPA - Environmental Protection Agency which protects
human health and safeguards.
Haze -fine
dust, smoke or light vapor causing a lack of transparency of the air.
Interpolation-
statistically estimating values of a function between two know values.
Isopleth graph - an isoline on a graph showing the
occurrence or frequency of a phenomenon as a function of two variables.
Inversion - an increase of temperature with height
through a layer of air.The usual
case in the atmosphere is that the warmer air is at or near the earthís
surface and the cooler increases as you go up the troposphere.
Latitude - the angular distance north or south from
the earthís equator measured through 90 degrees.
Longitude - the portion of the earthís equator
intersected between the meridian of the given place and the prime meridian and
expressed either in degrees or in time.
Mixing height - the top of a surface based layer of
air which is well mixed due to a mechanical and thermal turbulence.
Nitrogen oxides - one of the oxides of nitrogens which
is developed through combustion and is also considered a pollutant.
Ozone depletion - loss of ozone.
Ozone - three atomic molecules which make a bluish
kind of gas in the atmosphere with a pungent odor.It is considered to be a major pollutant in the lower atmosphere but a
beneficial component in the upper atmosphere.
Parts per million -the unit of measurement for ozone.
Ratio - a relationship of two different objects
represented as a quotient.
Smog - a colorless, odorless gas which burns to carbon
dioxide and it forms from an incomplete combustion of carbon.See also Ozone.
Stratosphere - the part of the earth's atmosphere which
extends from about 7 miles (11 kilometers) above the surface to 31 miles (50
kilometers) and in which temperature increases gradually to about 32ƒ
Fahrenheit (0ƒ C) and clouds rarely form.
Troposphere - the lowestpart of the earth's atmosphere in which most weather changes occur and
temperature generally decreases rapidly with altitude and which extends from the
surface to the bottom of the stratosphere.
Volatile Organic Compounds - organic chemical that are used as ingredients in products many consumer products.
Ultraviolet rays - damaging rays; radiation from the
sun.
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