Health Risks involved in EMF and to protect
What are EMFs?
Since the beginning of the universe, the sun has sent out waves that create EMFs, or radiation. At the same time the sun sends out EMFs, we can see its energy radiating out. This is visible light.
At the turn of the 20th century, electric power lines and indoor lighting spread across the world. Scientists realized that the power lines supplying all that energy to the world’s population were sending off EMFs, just like the sun does naturally.
Over the years, scientists learned that many of the emerging electrical appliances also create EMFs. As the medical world advanced, much of its diagnostic and treatment equipment, like imaging devices for X-rays and CT scans, were also found to make EMFs.
Today, 90 percent of the world’s population has access to electricity and uses electrical appliances. That means lots of electricity and EMFs are created around the world.
But even with all those waves, scientists generally don’t think EMFs are a health concern.
Types of EMF exposure
Radiation exists across what’s called the electromagnetic spectrum. This radiation ranges from very high-energy (called high-frequency) on one end of the spectrum, to very low-energy (or low-frequency) on the other end.
Examples of high-energy radiation include:
x-rays
gamma rays
some higher-energy ultraviolet (UV) rays
This is ionizing radiation, meaning this energy can affect cells on the atomic level by removing an electron from an atom, or “ionizing” it. Ionizing radiation can damage the body’s DNA and cells, which may contribute to genetic mutations and cancer.
On the other end of the spectrum is extremely low-frequency (ELF) radiation. This is a type of non-ionizing radiation. It can move atoms around in the body or make them vibrate, but most researchers agree that it isn’t enough to damage DNA or cells.
In between ELF radiation and high-energy radiation on the spectrum are other types of non-ionizing radiation, like:
radiofrequency (RF) radiation
visible light
infrared
Electric and magnetic fields join as one field in most forms of radiation. The result is called an electromagnetic field (EMF).
But the electric and magnetic fields in ELF radiation can act independently. So we use the terms “magnetic field” and “electric field” to refer to these two different fields in ELF radiation.
In summary, here are the two types of EMFs that you might be exposed to:
High-frequency EMFs. This is the ionizing type of radiation. Scientific literature agrees that large exposures can damage DNA or cellsTrusted Source. Medical devices like X-ray imaging machines and CT scans produce low levels of this type of radiation. Other sources include gamma radiation from radioactive elements and UV radiation from either tanning beds or the sun.
Low- to mid-frequency EMFs. This is the non-ionizing type of radiation. It’s mild and thought to be harmless to people. Household appliances like microwave ovens, cellphones, hair dryers, and washing machines, as well as power lines and MRIs, produce this type of radiation. This category of EMFs includes extremely low frequency EMFs (ELF-EMFs) and radiofrequency EMFs (RF-EMFs).
Non-ionizing EMFs come from both natural and human-made sources. The earth’s magnetic field is an example of a natural EMF. Human-made EMFs are classified into two types, both generated by non-ionizing radiation:
Extremely low-frequency EMFs (ELF-EMFs). This non-ionizing radiation field can be generated by a variety of sources, including power lines, electrical wiring, and personal appliances like electric shavers, hair dryers, and electric blankets.
Radiofrequency radiation. This non-ionizing radiation field is emitted from wireless devices, like cell phones, smart meters, tablets, and laptop computers. It’s also generated by radio and television signals, radar, satellite stations, and MRI machines.
Sources of radiation
EMF exposure intensity decreases as you increase your distance from the object that’s sending out waves. Some common sources of EMFs that emit varying levels of radiation include the following:
Non-ionizing radiation
microwave ovens
computers
smart meters
wireless (Wi-Fi) routers
cellphones
Bluetooth devices
power lines
MRI machines
Ionizing radiation
ultraviolet light (UV) radiation. UV radiation comes naturally from the sun, and from man-made sources like tanning beds, phototherapy, and welding torches
X-rays and gamma rays. This type of radiation comes from both natural and human-made sources. Natural sources include radon gas, the earth’s radioactive elements, and cosmic rays that hit the earth from beyond the solar system. Human-made sources include medical X-rays and CT scans and cancer treatment.
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