Mercury and most of its compounds are extremely toxic to human health, so when using products containing mercury such as thermometers, fluorescent bulbs, etc., we are often advised to be extremely careful, even when throwing them away. Mercury leakage incidents become especially serious in cases where mercury is burned (eg: fluorescent bulb factory fire, etc.) which will cause mercury to evaporate at high concentrations, combined with strong winds to disperse over a large area, greatly affecting human health.