The inhalation of mercury vapor can produce harmful effects on the nervous, digestive and immune systems, lungs and kidneys, and may be fatal. Mild, sub-clinical signs of central nervous system toxicity can be seen in workers exposed to an elemental mercury level in the air of 20 μg/m3 or more for several years.
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Following major earthquake, a 15- metre tsunami disable the power supply and cooling of three Daiichi reactors, causing a nuclear accident being on March 11, 2011. All three cords largely melted in the first three days.
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