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Fire is the rapid oxidation of a material in the exothermic chemical process of combustion, releasing heat, light, and various reaction products. Slower oxidative processes like rusting or digestion are not included by this definition.
Fire is hot because conversion of the weak double bond in molecular oxygen, O2, to the stronger bonds in the combustion products carbon dioxide and water releases energy (418 kJ per 32 g of O2); the bond energies of the fuel play only a minor role here. At a certain point in the combustion reaction, called the ignition point, flames are produced. The flame is the visible portion of the fire. Flames consist primarily of carbon dioxide, water vapor, oxygen and nitrogen. If hot enough, the gases may become ionized to produce plasma. Depending on the substances alight, and any impurities outside, the color of the flame and the fire's intensity will be different.
Fire in its most common form can result in conflagration, which has the potential to cause physical damage through burning. Fire is an important process that affects ecological systems around the globe. The positive effects of fire include stimulating growth and maintaining various ecological systems.
The negative effects of fire include hazard to life and property, atmospheric pollution, and water contamination. If fire removes protective vegetation, heavy rainfall may lead to an increase in soil erosion by water. Also, when vegetation is burned, the nitrogen it contains is released into the atmosphere, unlike elements such as potassium and phosphorus which remain in the ash and are quickly recycled into the soil. This loss of nitrogen caused by a fire produces a long-term reduction in the fertility of the soil, which only slowly recovers as nitrogen is "fixed" from the atmosphere by lightning and by leguminous plants such as clover.
Fire has been used by humans in rituals, in agriculture for clearing land, for cooking, generating heat and light, for signaling, propulsion purposes, smelting, forging, incineration of waste, cremation, and as a weapon or mode of destruction.

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  1. ATCclears

    Fire at two Saudia Arabia oil sites caused by attack of 10 drones

    https://gulfnews.com/business/energy/aramco-contains-fire-at-oil-sites-after-militia-attack-1.1568434597552
  2. raftman

    When is a gun too historic to fire?

    It can be kind of a tricky question and I’m interested in thoughts. Most people, myself included, don’t think twice about firing WW2-era firearms (unless it’s some particularly rare bird) but I’ve noticed when we start getting into WW1 and the early 20th century, there’s already bit more...
  3. wabbithunter

    Need Gunsmith to evaluate fire damage to firearms

    Hi gang, long time talk to you all, but I need help. I had a bad fire and damage most of my firearms, between AR's and 1911's and Palomar's guns, Glocks, Springfield's... So insurance company wants to bring them Into gunsmith to evaluate if repairable or replace. Sad thing my "First gun"(Nicke...
  4. accessbob

    Johnson Creek Gun Club - Fire today?!? 6/4/2019

    My PulsePoint Respond app showed a dispatch at about 11:52AM today for a fire at the Johnson Creek Gun Club. Does anyone know if that was accurate and, if so, what happened? The call looks like it was a total of about 3¼ hours.
  5. DB is Here

    Other State  Truck Owner’s Gun Fire Stops Property Theft

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  6. L84Cabo

    Eight men fire 80+ rounds into home of Colts assistant coach, Parks Frazier

    What the heck do you think was going on here? Sounds like a hit. Or maybe just wrong house?? Nobody was home at the time fortunately. Police: 8 men fire more than 80 shots into home of Colts assistant Parks Frazier
  7. The Heretic

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  8. nehalemguy

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  9. ditchtiger

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  10. T

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  11. Tony617

    Should I fire this .223 round?

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