EARTHSS 19 Lecture Notes - Lecture 7: Asthma, Formaldehyde, Sulfur Trioxide
28 Sep 2016
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Document Summary
Is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants. Pollutants formed from reactions of primary pollutants in air. Do not go directly into air, but result from one or more chemical-physical transformation. Includes lead (pb), soot or black carbon (bc), mineral dust. Small suspended solids and liquids that enter the atmosphere from natural and human sources. Can start as gases (voc = volatile organic carbon), end as pm. Removed by gravitational settling (falls) and by rain (washes) Co2 , ch4 , n2o, cfcs emitted from industrial, agricultural and fossil-fuel sources. O3 is made from voc & nox in the atmosphere. Toxic gases that injure biological material on contact.
