Hanoi demands urgent relocation of light bulb company after mercury leak
Up to 27.2 kilograms of liquid mercury is estimated to have vaporized under heat from the fire and released into the environment
Mercury levels in air, water near site of Hanoi fire exceed safety limit: ministry
The mercury levels are 10-30 times over safety limits set by WHO
Air quality near site of Hanoi factory fire checks out, but experts remain wary of health risks
Mercury used in the production of fluorescent light bulbs can vaporize under heat, causing negative symptoms if inhaled