пятница, 27 мая 2011 г.

Air Pollution: Causes and Effects


It keeps us alive but at the same time, it can also be harmful.
We breathe air everyday. Air provides us with oxygen that is essential for living. Nitrogen, water vapor, and inert gases comprise air along with oxygen. Emission of substances that contaminate air results to pollution.
Causes
Air pollution is both natural and human-based. Natural air pollution is caused by phenomenon such as volcanic eruption, wind erosion, decomposition and radioactive materials. Writing essay can only do as much in explaining each cause.
Volcanic eruptions send sulfur dioxide, tons of ash, and soot into the air which mixes with water vapor to form acid rain. Dirt particles can also be carried to the atmosphere during wind erosion. This happens in areas with less vegetation where soil cannot be held together.
Bacteria that feed on decaying organic matter like plants or animals produce methane and carbon dioxide, which are released into the atmosphere.
Earth's crust is composed is composed of a radioactive element called Uranium. Uranium turns into Radium once it decays afterward forming Radon. Radon is a gas that combines with air through evaporation.
Human activities or anthropogenic sources also cause air pollution. These activities mostly involve burning of fuel.
Stationary sources include factories and power plants. Mobile sources, on the other hand, are motor vehicles, aircraft, and water vessels.
There are still other human-based causes of air pollution. Landfills, where wastes get decomposed, generate methane. Use of aerosol sprays and the likes also contribute to air pollution.
Effects
Air pollution spreads easily as it travels into the atmosphere.
People get exposed to air pollution not just outdoors. Even in the comforts of our houses and workplaces, air pollution can also occur. This is known as indoor pollution.
Our respiratory and cardiovascular systems get affected by air pollution. The health risk air pollution poses depend on the type of chemical our bodies were exposed to, and the degree of exposure. It can either be short-term or long-term.

Examples of short-term effects are eye irritation, coughing, and sneezing. While long- term effects include heart disease, lung cancer, and damage to vital organs such as brain, liver, or kidneys. Air pollution can also worsen a person's medical condition.
Humans are not the only victims of air pollution. Environment also suffers. You may have read about this over again as air pollution effects is a common topic in writing essay. Acid rain can be fatal to trees and plants once it penetrates the soil and raises its acidity. Acid rain also causes damage to properties. It corrodes materials made of stone like statues and monuments.
Conclusion
Air pollution has long been a global problem.  You can help increase awareness on how to protect air by writing essay . Take your part in lessening air pollution, and save lives.

среда, 25 мая 2011 г.

Protection or Accessory?

Sunglasses' primary function is to serve as eye protectors. However, sunglasses are sometimes worn for the sake of looking more fashionable that it becomes just a mere accessory.
Sunglasses become an accessory when worn just to impress,
Signature sunglasses with glaring tag price have already invaded the market. To those who are more particular about the brand, these sunglasses are must-haves. In today's society, price commands social status. Expensive belongings denote class, poise, and financial stability. Practicality is not an issue for the brand conscious. Purchasing pricey materials is their way of spending money, wisely.
There are sunglasses that are not too costly but are of high quality. Couture brand names engraved on the frames is not a requirement in choosing which sunglasses to wear. Purchasing eyeglasses can be likened to seeking for  writing essays, you do not just pick somebody to assist you, you should pick somebody who can surely be of help.
If there are those who are willing to go all the way to shed out money to own signature sunglasses, there are some who are too thrifty, sometimes already compromising value. There's nothing wrong in saving, but remember health should always come first or you'll end up spending more. Sunglasses have to be equipped with ultraviolet (UV) protection. Labels contain this information. You can also consult eye-care professionals to check on the sunglasses' UV level of protection.
When it should really be worn as protection.
Sunglasses are composed of a pair of dyed lenses or glasses held together by a plastic or metal frame. They are used to protect the eyes against the harmful UV rays of the sun. Sunglasses provide comfort when directly exposed to bright light, which makes it perfect for outdoor activities. Sunglasses also prevent sand, and other dirt particles carried by wind, from getting to your eyes.
Quality sunglasses block excessive light from reaching the eyes. UV rays can damage the retina and the cornea. Ophthalmologists advise wearing sunglasses to avoid eye diseases that people may acquire as they age, such as cataract or clouding of eye lens. Sunglasses also shield the eyes from photokeratitis, a condition when the cornea gets burned. How will you work with the writing service company representative if your vision is blurry?
As sunglasses are considered part of an outfit, it is also subject for innovation and remodeling. Sunglasses now come in different colors, and styles. There are sunglasses especially made to cater to particular needs of men, and women. You may also choose a pair of glasses that reflects your personality.
Larger фотокнига sunglasses or the wraparound glasses are recommended as it can cover more of our eyes, even the side parts. There are also polarized sunglasses that reduce brightness. Reflection of light in water or roads can produce glare that blocks us from catching a clear or good view of the surroundings. Polarized sunglasses are beneficial for travelers driving down the road, and for fishermen out in the sea.

Therefore, you should
Use sunglasses as protection if you really want to make the most out of your day at the beach, or have the eye to work for a website offering writing service. Sunglasses were created for the eyes, not to boost one's ego.