The Naga Jolokia (the name originates from the ferocious Naga warriors what once inhabited Nagaland, an area in the far north-east part of India), also known as the Bhut Jolokia, ghost or cobra chile, is considered to be the hottest in the world. The Guiness World Records certified in 2007 that the Naga Jolokia was the hottest chile pepper recorded to date, being 400 times hotter than Tabasco sauce.
The Naga Jolokia is found in Bangladesh, the Assam region of northeastern India and Sri Lanka. These fiery little peppers (2 – 3 1/2 inches long and 1 to 1 1/2 inches wide) range in units of heat on the Scoville scale from 850,000 units to 1,042,000. For comparison purposes, Tabasco sauce measures from 2,500 to 5,000 units. Yikes! The Scoville rating of these chiles is dramatically impacted by the climate they are grown in (they will have far less heat if grown in an arid versus a humid climate).
Believe it or not, this chile is used in India as a homeopathic remedy for stomach ailments, as a spice to induce perspiration in the heat of summer (for natural air-conditioning purposes), in smoke bombs or smeared on fences to keep wild elephants away, as a hand grenade ingredient for crowd and terrorist control, and as a pepper spray ingredient for police use and self-defence.