Electromagnetic People Killer – Mobile Phone
4 May 2009 | Green Technology | 1 Comment
Mobile phones, called also cellular phones, are an integrating part of modern telecommunications, which offer the possibility of maintaining the continual communication without affecting the movement liberty.In many countries, more than half of the population uses mobile phones and the market develops fast.The prognosis shows that in 2009 will be, in the entire world, 1,9 bilion of surscribers of the mobile telephony services.Because of this reason it was necessary the installation of an increased number of basis station.The basis stations are radio antennas of low power that communicate with the users apparatus.At the beginning of 2000, they were about 2000 basis stations functioning in Great Britain and about 82.000 locations destined to the cellular telephony in the United States, each location including one or more basis stations.
On the pollution effects due to the mobile telephones were made numerous studies, the results of recent studies regarding the effects of the exposure to the electromagnetic fields of radio frequency (RF) on human beings are supplied by the World Health Organization, the Royal Society of Canada and by a committee of experts in Great Britain.
The RF fields get in the tissues exposed to depths that depend on frequency – until 1 cm at the frequencies used by mobile phones.The RF energy is absorbed in the body and produces tissues heating which is dispersed normally through the thermo adjustment mechanism of the body.All the proved effects of the exposure to RF are clearly connected to the heating.While the RF energy can interact with alive tissues at low levels to produce a significant heating, none of the studies did not put into evidence the unwanted effects on health at exposure levels under the authorized limits through international directives.
More studies on animals exposed to the RF fields similar to these emitted by the mobile phones have not found any proof that RF produce or favor brain tumors.While a study made in 1997 revealed the increase of the rate at which the lymphomas were developed at the mice genetically modified, the implications of this result on health are still ambiguous.Nowadays there are running more studies to confirm this observation and to determine any revelance to human cancer.Three epidemologic recent studies have not found any convincing proof of the increase of cancer risk or any other disease along with the use of the mobile phones.
New Portable Water Purification Device
30 April 2009 | Green News, Green Technology | No Comments
In a previous post I presented one of the inexpensive ways to purify water, using solar energy(“A basic solar still is a verysimple device.If salty or contamined water is left in an open container, the fresh water will evaporate into the air, separating itself from the salt, dirt, algae, or other organic pollutants in the water.A solar still uses solar energy to speed up the avaporation rate and captures the evaporated water by condensing it onto a cool surface.A solar still, then, is essentially an insulated, dark-colored container or shallow pan, covered by a sheet of clear glass or plastic that is tilted slightly to let the fresh water that condense on it trickle down into a collection through.”http://www.mygreentreasure.com/2009/04/the-sun-can-make-water-safe-to-drink-and-ice-for-many-uses/) .But for few days ago, this invention is competed by a new portable water purification system designed by Ceren Bagatar.