How does air pollution move?
Air transport is the term used to describe the mechanism by which air
pollution moves from an emissions
source to a receptor. A source is a location (i.e., smokestack, chimney,
exhaust pipe) from which the pollutant emanates and a receptor is the place
(i.e., soil, vegetation, waterbodies, human lungs) where the pollutant is
deposited. The atmosphere itself is the transporter of pollutants from sources
to receptors. If the wind carries the plume of pollution high enough in the
air, it may travel for hundreds of miles before being brought to earth. This is
known as long-range or long-distance transport.
Air
Pollution Effects
The air is an important component of
the natural system of a park in its own right. The presence of pollution in the
atmosphere results directly in air quality degradation. Air pollution is also a
critical factor affecting the quality of other environmental resources as well
as the human-made structures and facilities in the area. Polluted air can and
has harmed park resources in a variety of ways depending upon the chemistry of
the pollutant, weather and environmental conditions, and the nature or
sensitivity of park resources. Examples of this harm include vegetative
discoloration and growth disruption from ozone, loss of aquatic species from
stream acidification, shifts in nutrient availability from acid deposition, and
erosion of building surfaces and rock formations. Air pollution impairs
visibility and contributes to climate change. Air pollution can also be
detrimental to human health.
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