Widespread use of CellPhone technology is a growing concern for medical researchers who believe that there could be both short-term and long-term health hazards associated with it.
Mobile phones communicate with base stations using radio frequency radiation and RF radiation at a significant level has a thermal effect, which means that it raises body temperature. And this electromagnetic RF radiation from the cell phones even to some extent heats up brain tissue and may even damage them as the cell phone is usually kept close to ear, which is very near to the brain. Research has also shown that along with the increase of the temperature of the brain, it is also possible that the radiation raises blood pressure thus acting on the whole central nervous system.
Health hazards of CellPhones(Mobiles) Radiation absorptionPart of the radio waves emitted by a cellphones are absorbed by the human head.
The rate at which radiation is absorbed by the human body is measured by the Specific Absorption Rate (SAR), and its maximum levels for modern handsets have been set by governmental regulating agencies in many countries. In the USA, the FCC has set a SAR limit of 1.6 W/kg for most parts of the body.
Thermal effectsOne well-understood effect of microwave radiation is dielectric heating, in which any dielectric material (such as living tissue) is heated by rotations of polar molecules induced by the electromagnetic field. In the case of a person using a cell phone, most of the heating effect may occur in the head surface, causing its temperature to increase by a fraction of a degree. The level of temperature increase is an order of magnitude less than that obtained during the exposure of head to direct sunlight. The brain's blood circulation easily disposes of excess heat by instantaneously increasing local blood flow. However, the cornea of the eye does not have this temperature regulation mechanism. Premature cataracts is known as an occupational disease of engineers who work on high power radio transmitters at similar frequencies. Cataracts have not been reported to occur in users of mobile telephones, even heavy users.
It has been claimed that some parts of the human head are more sensitive to damage due to increases in temperature, particularly in anatomical structures with poor vasculature, such as nerve fibers. Continuous use of a mobile phone for a decade or longer can lead to a small increase in the probability of getting acoustic neuroma, a type of brain tumor. The increase was not noted in those who used phones for less than 10 years.
Mobile phones and cancerAccording to Kjell Hansson Mild, who led the study, heavy users of mobile phones have a 240 percent increased risk of developing a malignant tumor on the side of the head where they press the phone to their ear.
Sleep Effects
The research also found that those exposed to mobile phones during their sleep appear to have more headaches, than those not exposed.
Radiation from mobile phones delays and reduces sleep, and causes headaches and confusion.
Electromagnetic hypersensitivity syndromeMany users of mobile handsets have reported feeling several unspecific symptoms during and after its use, such as burning and tingling sensations in the skin of the head and extremities, fatigue, sleep disturbances, dizziness, loss of mental attention, reaction times and memory retentiveness, headaches, malaise, tachycardia (heart palpitations) and disturbances of the digestive system. Some researchers, implying a causal relationship, have named this syndrome as a new diagnostic entity.
Cellular Tower Health HazardsThe deal seemed to be good, including physical upgrades such as hiding the antennas in the residential Area and a monthly lease payment. Yet many in the congregation expressed concern about the risk of exposure to harmful levels of RF radiation. They questioned whether it would be safe to live while antennas, literally right over their heads, pumped out hundreds of watts of radio power.
As more people choose to rely on cell phones for their primary phone service, coverage in residential areas is becoming a key competitive issue. That means more towers located near homes, schools , and more parents worrying about how exposure to resulting RF radiation might be damaging their children.
One way to do that might be to put some hard numbers behind our general assertions that cellular towers pose no risk. As a worst-side in terms of exposure to RF radiation, consider a mobile tower located only 30 meters away & transmitting a total of 500Watt effective radiated power. Of course, if you are only 30 meters from the transmitting antennas, you also are likely well below their horizontal beam centers even if severe down tilt is used. But for the sake of our worst-case analysis, let's assume that the full 500W is aimed right at you.
In the next post I'll tell you what precaution should take when we use cell phones...
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