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"An Ecosystem's Disturbance By A Pollutant
L. Lehr
Freedman defines a pollutant as "the occurrence of toxic substances or energy in
a larger quality then the ecological communities or particular species can
tolerate without suffering measurable detriment" (Freeman, 562). Although the
effects of a pollutant on an organism vary depending on the dose and duration
(how long administered). The impact can be one of sublethality to lethality, all
dependent upon the factors involved. These factors need to be looked at when
determining an ecosystem's disturbance by a pollutant.
Some of the most frequent pollutants in our ....
Word count: 2974 - Page count: 11
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