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Electromagnetic radiation has been around since the birth of the universe; light is its most familiar form. Electric and magnetic fields are part of the spectrum of electromagnetic radiation which extends from static electric and magnetic fields, through radiofrequency and infrared radiation, to X-rays.

Comprehensive information is provided hereafter on what electromagnetic fields are, their impact on health, as well as the current exposure standards and recommended precautions.

http://emfnews.org/Lifewave-Cellphone-Matrix-Shield-Test.html