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20 ώρες πριν · Indoor air quality (IAQ) is the air quality within buildings and structures.Poor indoor air quality due to indoor air pollution is known to affect the health, comfort, and well-being of building occupants. It has also been linked to sick building syndrome, respiratory issues, reduced productivity, and impaired learning in schools.Common pollutants of indoor air include: secondhand tobacco ...
20 ώρες πριν · Dielectric heating from electromagnetic radiation can create a biological hazard. For example, touching or standing around an antenna while a high-power transmitter is in operation can cause burns. The mechanism is the same as that used in a microwave oven.. The heating effect varies with the power and the frequency of the electromagnetic energy, as well as the inverse square of distance to ...
20 ώρες πριν · e. Renewable energy (or green energy) is energy from renewable natural resources that are replenished on a human timescale. The most widely used renewable energy types are solar energy, wind power and hydropower. Bioenergy and geothermal power are also significant in some countries. Some also consider nuclear power a renewable power source ...
