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Air pollution refers to the presence of chemicals and natural substances in the air which cause a significant alteration of the air's property, especially when it relates to its breathability. While environmental pollution can happen anywhere, air pollution is mainly a problem of urban areas, especially large cities in heavily... more »
Air pollution is a top concern among environmentalists and conservationists. Hundreds of laws are aimed at reducing air pollution and minimizing its effects, and herbalists have created numerous detoxification and cleansing solutions to heal the body from the damage caused by air pollution. Doctors and researchers have uncovered... more »
Asthma is a chronic respiratory disease that affects millions of Americans, many of them children. The symptoms of asthma--lack of breath, wheezing or coughing--are caused by the constriction of the muscles in bronchial airways by an autoimmune response to stressors called "triggers." Untreated asthma can lead to inflammation,... more »
Nomex® is a high-performance polymer able to withstand high temperatures, flame and many chemical compounds. DuPont manufactures Nomex® in a variety of forms to suit its various uses. more »
Excess mucous can come about from a variety of things. Allergies, sinus inflammation after respiratory illness and chronic sinusitis are but just a few causes. Excessive post-nasal drip affects children and adults alike for various periods of time. Sipping water will help thin mucous and reduce throat irritation that otherwise would... more »
A wide range of diseases can affect your lungs. Luckily, eHow’s experts are here to not...
Liquid diets are popular for detoxifying the body and to jump start a diet. Detox and cleansing...
Asthma is a disease of the lungs, causing coughing, wheezing and shortness of breath. It is...
Atmosphere is defined as a gaseous blanket that protects the Earth from harmful rays from the sun. The addition of toxic substances, along with... more »
Air pollution is a global issue but it's also lurking right outside your door. It's a complicated technical issue and it's difficult to know what... more »
People with asthma have attacks that are caused by triggers. Some of these triggers are pollutants in the air. Research suggests air pollution is... more »
Air pollution is mainly due to the burning of fossil fuels. Large amounts of carbon dioxide and harmful molecules are released into the... more »
People smoke virtually everywhere in the world, and age isn't a discriminating factor. Yet the smoke produced by smoking has been found to cause... more »
Air pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or damages the natural environment, into the atmosphere.
The atmosphere is a complex, dynamic natural gaseous system that is essential to support life on planet Earth. Stratospheric ozone depletion due to air pollution has long been recognized as a threat to human health as well as to the Earths ecosystems.
Pollutants
An air pollutant is known as a substance in the air that can cause harm to humans and the environment. Pollutants can be in the form of solid particles, liquid droplets, or gases. In addition, they may be natural or man-made.
Pollutants can be classified as either primary or secondary. Usually, primary pollutants are substances directly emitted from a process, such as ash from a volcanic eruption, the carbon monoxide gas from a motor vehicle exhaust or sulfur dioxide released from factories.
Secondary pollutants are not emitted directly. Rather, they form in the air when primary pollutants react or interact. An important example of a secondary pollutant is ground level ozone — one of the many secondary pollutants that make up photochemical smog.
Note that some pollutants may be both primary and secondary: that is, they are both emitted directly and formed from other primary pollutants.
About 4 percent of deaths in the United States can be attributed to air pollution, according to the Environmental Science Engineering Program at the Harvard School of Public Health.
Major primary pollutants produced by human activity include:
* Sulfur oxides (SOx) - especially sulfur dioxide, a chemical compound with the formula SO2. SO2 is produced by volcanoes and in various industrial processes. Since coal and petroleum often contain sulfur compounds, their combustion generates sulfur dioxide. Further oxidation of SO2, usually in the presence o read more at » http://en.wikipedia.org/wiki/Air+pollution
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