Floors that are useful for a living?

Doctors found that live high - harmful to health. The fact is that for normal living organism needs a certain level of Earth's magnetic field. If it weakens, then the person has serious health problems. The experts thoroughly examined this question. It was found that above the 7th floor weakening the magnetic field is such that it adversely affects the health. The attenuation coefficient is not sanitary standards, but a decrease of the field twice already harmful. In addition, doctors have considered the effect on the material from which the building is constructed. Thus, the field weakens the concrete by 10%, brick - 7%, and the tree only by 1%. The weakened geomagnetic field harms the cardiovascular, nervous and immune systems, making the body extra load.
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Source: mirfactov.com/