It is easy to see how people riding in subways can be
exposed to a higher level of cell phone radiation. Not only are crowds of
commuters using the phone at the same time, but phones in enclosed spaces, and
in moving vehicles such as trains, have to work harder to connect to base
stations. An environmental group in South Korea has confirmed this in a
recent study.
Koreans routinely play with their cell phones and other
mobile devices when they board the subway, but many are unaware of the risks
attached.
A new study by National Institute of Environmental Research
measured the amount of radiation emitted by cell phones when traveling on
subways and other forms of high-speed transportation. It found that mobile
phones produced electromagnetic fields that were more than five times stronger
when in transit than when in a stationary position. A similar trend was evident
when cell phones were used within confined spaces such as elevators.
“Inside subways, the radio waves coming out of cell phones
are constantly trying to connect to base stations. This process requires a
large amount of electromagnetic energy. Also when in an elevator, these waves
bounce off you,” a researcher at the Korean institute said.
The World Health Organization has classified cell phones as
a possible carcinogen, meaning that the use of mobile phones may increase the
risk of developing certain brain cancers. “When you have to phone someone, make
sure your calls are as short as possible. And in order to reduce your exposure
to radio waves, use earphones when making calls for an extended period of
time,” the institute added.
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