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Laki, a volcanic fissure in Iceland (pictured), began an eight-month eruption, triggering a major famine and causing widespread fluoride poisoning.
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Laki
Volcanic fissure in Iceland
Laki or Lakagígar is a volcanic fissure in the western part of Vatnajökull National Park, Iceland, not far from the volcanic fissure of Eldgjá and the small village of Kirkjubæjarklaustur. The fissure is properly referred to as Lakagígar, while Laki is a mountain that the…Source: Wikipedia (CC BY-SA)
Fissure vent
Linear volcanic vent through which lava erupts
A fissure vent, also known as a volcanic fissure, eruption fissure or simply a fissure, is a linear volcanic vent through which lava erupts, usually without any explosive activity. The vent is often a few metres wide and may be many kilometres long. Fissure vents can cause large…Source: Wikipedia (CC BY-SA)
Fluoride toxicity
Condition in which there are elevated levels of the fluoride ion in the body
Fluoride toxicity is a condition in which there are elevated levels of the fluoride ion in the body. Although fluoride is safe for dental health at low concentrations, sustained consumption of large amounts of soluble fluoride salts is dangerous. Referring to a common salt of…Source: Wikipedia (CC BY-SA)