The Kuwaiti oil fires were caused by Iraqi military forces setting fire to 700 oil wells as part of a scorched earth policy while retreating from Kuwait in 1991 after conquering the country but being driven out by Coalition military forces (see Gulf War). The fires started in January and February 1991 and the last one was extinguished by November 1991.
The resulting fires burned out of control because of the dangers of sending in firefighting crews. Land mines had been placed in areas around the oil wells, and a military cleaning of the areas was necessary before the fires could be put out. Somewhere around 6 million barrels (950,000 m3) of oil were lost each day. Eventually, privately contracted crews extinguished the fires, at a total cost of US$1.5 billion to Kuwait. By that time, however, the fires had burned for approximately ten months, causing widespread pollution.
The byproducts of the petroleum burn caused pollution to the soil and air, and the oil fires have been linked with what was later called Gulf War Syndrome, however, studies have indicated that the firemen who capped the wells did not report any of the symptoms suffered by the soldiers.  Whether this syndrome has been caused by the oil fires, by chemical attack, or other causes has not been determined, and the longterm environmental effects of the fires have yet to be fully understood.
During Operation Desert Storm, Dr. S. Fred Singer debated Carl Sagan on the impact of the Kuwaiti petroleum fires on the ABC News program Nightline. Sagan said we know from the nuclear winter investigation that the smoke would loft into the upper atmosphere and that he believed the net effects would be very similar to the explosion of the Indonesian volcano Tambora in 1815, which resulted in the year 1816 being known as the Year Without a Summer, in massive agricultural failures, in very serious human suffering and, in some cases, starvation.
He predicted the same for south Asia, and perhaps for a significant fraction of the northern hemisphere as well as a result. Singer, on the other hand, said that calculations showed that the smoke would go to an altitude of about 3,000 feet (910 m) and then be rained out after about three to five days and thus the lifetime of the smoke would be limited.
In retrospect, it is now known that smoke from the Kuwait Oil Fires dominated the weather pattern throughout the Persian Gulf and surrounding region during 1991, and that lower atmospheric wind blew the smoke along the eastern half of the Arabian Peninsula, and cities such as Dhahran and Riyadh, and countries such as Bahrain experienced days with smoke filled skies and carbon fallout.
The companies responsible for extinguishing the fires initially were Red Adair Company (now sold off to Global Industries of Louisiana), Boots and Coots (now Boots and Coots/IWC), Wild Well Control. Other companies including Safety Boss, Cudd Well/Pressure Control, Neal Adams Firefighters, and Kuwait Wild Well Killers were also contracted. All the wells were eventually fully extinguished and brought back under control.
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