Pollution is the contamination of any feature of the environment and
attached to it are certain characteristics. It is the addition of a substance or
substances at a faster rate than the environment can accommodate.
Certain pollutants like arsenic and mercury have natural levels in nature
but only if these levels exceed certain critical values, will it be considered
pollutants. Pollutants are not only chemicals but also forms of energy like
heat, sound and radioactive rays. To be a pollutant, a material has to be
potentially harmful to life. Air pollution is a problem that has existed since
humans first used fire. Two major causes of air pollution include exhaust
fumes from cars and trucks and pollutants produced by human activities,
which result in a number of health risks. In order to improve our air quality,
we must work together as a nation and do our part to attain cleaner air.
Our air is colorless, odorless and tasteless, making it barely
noticeable unless air is polluted with particles of dust, smoke, pollen or
unpleasant odors. Many pollutants can not be seen or smelled, which
allows gases to combine with other substances or gases, creating
compounds that are harmful to living things and inanimate objects. One of
the major human produced air pollutants is sulfur dioxide, which is
released from industries, power plants and home heating. Smoke and
ashes also pour from the coal being burned from factories, shops,
electric power plants, and home fireplaces. Out of six pollutants, nitrogen
dioxide is the pollutant linked with the most number of early deaths and
hospitalizations. Its major sources have to do with motor vehicle exhaust,
heat and power generation, nitric acid, explosives and fertilizer plants. It is
in the air that we breath that is causing many deaths and diseases, which...
General comment
could have named it "pollution crises" rather than "world issues" because world issues are more than just the pollution that was described in detail,overall very good essay.just that the title confused my into looking thru.
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