1) I have made experiments with human blood (coagulation speed) and with milk proteins (cheese process speed). I found very little effects. Most significant effects were in the 0-2 Hz frequency range; so very slow movements of molecules in liquid, due to electromagnetic fields.

2) It has been shown that migrating birds are sensitive to 500 kHz to 5 MHz of radio noise, especially AM modulated noise. They lose the sense of direction (inner compass no longer works, due to the mix of earth magnetic field and electric noise fields).

1) I have made experiments with human blood (coagulation speed) and with milk proteins (cheese process speed). I found very little effects. Most significant effects were in the 0-2 Hz frequency range; so very slow movements of molecules in liquid, due to electromagnetic fields.

2) It has been shown that migrating birds are sensitive to 500 kHz to 5 MHz of radio noise, especially AM modulated noise. They lose the sense of direction (inner compass no longer works, due to the mix of earth magnetic field and electric noise fields).

1.Extremely-low-frequency RF:

High-power extremely-low-frequency RF with electric field levels in the low kV/m range are known to induce perceivable currents within the human body that create an annoying tingling sensation. These currents will typically flow to ground through a body contact surface such as the feet, or arc to ground where the body is well insulated.

2.Shortwave frequency RF:

Shortwave Diathermy heating of human tissue only heats tissues that are good electrical conductors, such as blood vessels and muscle. Adipose tissue (fat) receives little heating by induction fields because an electrical current is not actually going through the tissues. 

3.Microwaves:

Microwave exposure at low-power levels below the specific absorption rate set by government regulatory bodies are considered harmless non-ionizing radiation and have no effect on the human body. However, levels above the specific absorption rate set by the FCC are considered potentially harmful. ANSI standards for safe exposure levels to RF and microwave radiation are set to a SAR level of 4 W/kg, the threshold before hazardous biological effects occur due to energy absorption in the body. A safety factor of ten was then incorporated to arrive at the final recommended protection guidelines of a SAR exposure threshold of 0.4 W/kg for RF and microwave radiation. There is disagreement over exactly what levels of RF radiation are "safe," particularly with regard to low levels of exposure. For instance, Russia and eastern European countries in particular set SAR thresholds for Microwaves and RF much lower than western countries.Two areas of the body, the eyes and the testes, can be particularly susceptible to heating by RF energy because of the relative lack of available blood flow to dissipate the excessive heat load. Laboratory experiments have shown that short-term exposure to high levels of RF radiation (100-200 mW/cm²) can cause cataracts in rabbits. Temporary sterility, caused by such effects as changes in sperm count and in sperm motility, is possible after exposure of the testes to high-level RF radiationLong-term exposure to high-levels of microwaves, is recognized, from experimental animal studies and epidemiological studies in humans, to cause cataracts. The mechanism is unclear but may include changes in heat sensitive enzymes that normally protect cell proteins in the lens. Another mechanism that has been advanced is direct damage to the lens from pressure waves induced in the aqueous humor.Exposure to high-power microwave RF is known to create effects ranging from a burning sensation on the skin and microwave auditory effect, to extreme pain at the mid-range, to physical microwave burns and blistering of skin and internals at high power levels.

4.Millimeter waves:

Recent technology advances in the developments of Millimeter wave scanners for airport security and WiGig for Personal area networks have opened the 60 GHz and above Microwave band to SAR exposure regulations. Previously, microwave applications in these bands were for point-to-point satellite communication with minimal human exposure. Radiation levels in the millimeter wavelength represent the high microwave band or close to Infrared wavelengths.

5.Infrared:

Infrared wavelengths longer than 750 nm can produce changes in the lens of the eye. Glassblower's cataract is an example of a heat injury that damages the anterior lens capsule among unprotected glass and iron workers. Cataract-like changes can occur in workers who observe glowing masses of glass or iron without protective eyebrow for many hours a day.Another important factor is the distance between the worker and the source of radiation. In the case of arc welding, infrared radiation decreases rapidly as a function of distance, so that farther than 3 feet away from where welding takes place, it does not pose an ocular hazard anymore but, ultraviolet radiation still does. This is why welders wear tinted glasses and surrounding workers only have to wear clear ones that filter UV.

6.Visible Light:

Moderate and high-power lasers are potentially hazardous because they can burn the retina of the eye, or even the skin. To control the risk of injury, various specifications – for example ANSI Z136 in the US, and IEC 60825 internationally – define "classes" of lasers depending on their power and wavelength. These regulations also prescribe required safety measures, such as labeling lasers with specific warnings, and wearing laser safety goggles during operation (see laser safety).As with its infrared and ultraviolet radiation dangers, welding creates an intense brightness in the visible light spectrum, which may cause temporary flash blindness. Some sources state that there is no minimum safe distance for exposure to these radiation emissions without adequate eye protection.[20]

7.Ultraviolet:

Short-term exposure to strong ultraviolet sunlight causes sunburn within hours of exposure.Ultraviolet light, specifically UV-B, has been shown to cause cataracts and there is some evidence that sunglasses worn at an early age can slow its development in later life.Most UV light from the sun is filtered out by the atmosphere and consequently airline pilots often have high rates of cataracts because of the increased levels of UV radiation in the upper atmosphere.It is hypothesized that depletion of the ozone layer and a consequent increase in levels of UV light on the ground may increase future rates of cataracts.Note that the lens filters UV light, so once that is removed via surgery, one may be able to see UV light.Prolonged exposure to ultraviolet radiation from the sun can lead to melanoma and other skin malignancies.Clear evidence establishes ultraviolet radiation, especially the non-ionizing medium wave UVB, as the cause of most non-melanoma skin cancers, which are the most common forms of cancer in the world.UV rays can also cause wrinkles, liver spots, moles, and freckles. In addition to sunlight, other sources include tanning beds, and bright desk lights. Damage is cumulative over one's lifetime, so that permanent effects may not be evident for some time after exposure.Ultraviolet radiation of wavelengths shorter than 300 nm (actinic rays) can damage the corneal epithelium. This is most commonly the result of exposure to the sun at high altitude, and in areas where shorter wavelengths are readily reflected from bright surfaces, such as snow, water, and sand. UV generated by a welding arc can similarly cause damage to the cornea, known as "arc eye" or welding flash burn, a form of photokeratitis.

8.Radio frequency fields:

 Mobile phone radiation and health Apart from some suspicion that the electromagnetic fields emitted by mobile phones may be responsible for an increased risk of glioma and acoustic neuroma, the fields otherwise pose no risk to human health.This designation of mobile phone signals as "possibly carcinogenic" by the World Health Organization has often been misinterpreted as indicating that of some measure of risk has been observed – however the designation indicates that the possibility could not be conclusively ruled out using the available data

As far as ELF is concern, it is nearly DC. At low power/signal strength, there is no adverse effect. The current flow through body creates effect of burning (due to water loss as power converted into heat). Generally, it happens around 70Volts and above (It may vary individual to individual due to different body resistance/impedance). 

Anil from VIT has written a very comprehensive review in his answer. However, even the ELF radiation at high power can cause considerable physical damage manifested through headache, nausea etc. These effects have been reported by people living near high tension lines.

Further, radiation hazards from cell phone towers are much more serious than radiation from hand sets.

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