[Answer] What is the difference between primary and secondary air pollutants?

Answer: primary pollutants enter the atmosphere directly whereas secondary pollutants form from substances within the atmosphere
What is the difference between primary and secondary air pollutants?

Fri Mar 18 2005 13:30:00 GMT-0500 (Eastern Standard Time) · The NAAQS are health based and the EPA sets two types of standards: primary and secondary. The primary standards are designed to protect the health of ‘sensitive’ populations such as asthmatics children and the elderly. The secondary …

Pollutants are classified as primary or secondary. Primary pollutants are usually produced by processes such as ash from a volcanic eruption. Other examples include carbon monoxide gas from motor vehicle exhausts or sulfur dioxide released …

Air pollution – Wikipedia

Air pollution – Wikipedia

Air pollution – Wikipedia

National Ambient Air Quality Standards – Wikipedia

Pollutants can cross international borders and therefore international regulations are needed for their control. The Stockholm Convention on Persistent Organic Pollutants which entered into force in 2004 is an international legally binding agreement for the control of persistent organic pollutants. Pollutant Release and Transfer Registers (PRTR) are systems to collect and disseminate information on environmental releases and transfers of toxic chemicals from industrial and other facilities.

Secondary pollutants such as ozone are formed when primary pollutants undergo chemical reactions in the atmosphere. Photochemical smog as found for example in Los Angeles is a type of air pollution derived from vehicular emission from internal combustion engines and industrial fumes.

Tue Jan 13 2015 13:30:00 GMT-0500 (Eastern Standard Time) · Ambient air quality criter…

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