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For example, lightning during a thunderstorm creates electromagnetic radiation because it creates a current between the sky and the ground.

ELECTROMAGNETIC FIELD FOR REGENERATIVE DEEP SLEEP

Surrounding that current is an electromagnetic field. One example is the Earth's magnetic field.

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This magnetic field makes compasses work and is also used by pigeons and fish to navigate. The image below shows the range of frequencies for different forms of electromagnetic radiation found in the electromagnetic spectrum. The waves from power lines and electrical devices have a much lower frequency than other types of EMR, such as microwaves, radio waves or gamma rays.

However, a low frequency wave does not necessarily mean that it is low energy; a charging cable for a phone produces a low frequency, low energy electromagnetic field, while a high-tension power line can create a much higher energy electromagnetic field that is still low in frequency.

Exposure of Insects to Radio-Frequency Electromagnetic Fields from 2 to 120 GHz

EMR associated with power lines is a type of low frequency non-ionizing radiation. Electric fields are produced by electric charges, and magnetic fields are produced by the flow of electrical current through wires or electrical devices. Because of this, low frequency EMR is found in close proximity to electrical sources such as power lines. As current moves through a power line, it creates a magnetic field called an electromagnetic field.

The strength of the EMF is proportional to the amount of electrical current passing through the power line and decreases as you move farther away.

Early findings in lab show reduced ability of cells to migrate

Electromagnetic fields alter the motility of metastatic breast cancer cells. Communications Biology , ; 2 1 DOI: ScienceDaily, 8 August Ohio State University. Electromagnetic fields may hinder spread of breast cancer cells: Early findings in lab show reduced ability of cells to migrate.


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Electromagnetic fields in daily life | RIVM

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    Electric and Magnetic Fields from Power Lines

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