Indoor sources of harmful factors
Indoor items in the direct distribution of harmful factors,(
air purifier) many objects and indoor products, which itself contains a variety of harmful factors, once exposed to
Air comes out it will cause harm. Mainly from the following aspects: building materials. Some cement, bricks, lime and other building materials
(
air cleaner)
Raw material in itself contains radioactive radium. Until the building is completed, the decay of radium radon material (222Rn) and its progeny is released into the indoor
Air, into the human respiratory tract, is one of the causes of lung cancer. Outdoor air radon concentration of about 10Bq/m3 less indoor pollution can be super-serious
Several times. Radon and its daughters by the United States due to the excess lung cancer deaths in 1 to 2 million.
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