The reduction in the stratospheric ozone layer. Stratospheric ozone shields the Earth from ultraviolet radiation. The breakdown of certain chlorine and / or bromine-containing ...
The pollutant concentration used by air quality managers for designating attainment status of an air district with respect to the state and federal ambient air quality standards. ...
The number of potential excess cancer cases from a lifetime exposure to one microgram per cubic meter (µ/m 3 ) of a given substance. For example, a unit risk value of 5. 5x10 -6 ...