The most basic is radiation; Electromagnetic waves or small particles. Today, it seems impossible to completely get rid of radiation. But we can get it down the most.
X-rays, tomography and medical equipment, television, radio, mobile phones are the biggest sources of radiation. The plugs must be unplugged from the power outlet when you turn off these types of appliances that we use at home. Take computer monitor to see if it has low radiation. Headphones should be used when talking to a mobile phone. If the mobile phone is possible, the jacket should not be placed in the inner pocket so as not to touch the body.
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From @trik