Related Words

Ambient: Any unconfined portion of the atmosphere, open air, outside surrounding air.

Ambient Temperature: The temperature of the surrounding cooling medium, such as gas or liquid, which comes into contact with the heated parts of the motor. The cooling medium is usually the air surrounding the m . . . View Full Definition

National Ambient Air Quality Standards (NAAQS): National standards set by the Environmental Protection Agency under authority of the Clean Air Act: NAAQS define the maximum allowable concentrations of specified air pollutants in outdoor ( . . . View Full Definition

Ambient Light: The natural light in a scene.

Ambient Sound: Background sounds of a particular room or location.

Ozone (O3): A nearly colorless gas and a form of oxygen (O2). It is composed of an oxygen molecule made up of three oxygen atoms instead of two.

Particulates: The Environmental Protection Agency has set National Ambient Air Quality Standards for particulates. One, in effect since 1987, regulates particles smaller than 10 microns in diameter (PM10) . . . View Full Definition

Attainment Area: An area considered to have air quality as good as or better than the National Ambient Air Quality Standards as defined in the Clean Air Act. An area may be an attainment area for one polluta . . . View Full Definition

Water Quality Standards: State-adopted and the Environmental Protection Agency-approved ambient standards for water bodies. The standards prescribe the use of the water body and establish the water quality criteria . . . View Full Definition

Clean Air Act: The primary federal law governing efforts to control air pollution. Federal legislation addressing air pollution was first adopted in 1955 (Air Pollution Control Act, P.L. 84-159) to provide . . . View Full Definition