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This article is within the scope of WikiProject Physics, a collaborative effort to improve the coverage of Physics on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
This article is within the scope of WikiProject Energy, a collaborative effort to improve the coverage of Energy on Wikipedia. If you would like to participate, please visit the project page, where you can join the discussion and see a list of open tasks.
Fire is the rapid combination of oxygen with fuel in the presence of heat, typically characterized by flame, a body of incandescent gas that contains and sustains the reaction and emits light and heat.
I like this better than the current lede, which fails to mention that fire is a "body on incandescent gas" and is self-sustaining. 188.8.131.52 (talk) 20:25, 25 March 2013 (UTC)
Oxygen isn't necessary. Other gases such as chlorine will work instead. DOwenWilliams (talk) 20:33, 25 March 2013 (UTC)
If fire is defined as an oxidation-reduction reaction, involving the oxygen in ambient air and a "fuel", then that discounts chlorine. You could have added that fluorine will work as well, and that would also be true. Both of those processes would be oxidation-reduction reactions, involving chlorine (or fluorine) and a fuel; but neither of them are naturally occuring since we don't live in a world containing approximately 21% by volume of chlorine. Pyrotec (talk) 19:38, 11 April 2013 (UTC)
The second paragraph of this section, on torture and execution, is completely irrelevant to the paragraphs above and below it. If there's any point in retaining it, it should probably be moved below the paragraph on fire in warfare. 184.108.40.206 (talk) 15:47, 11 April 2013 (UTC)
Yes, I would agree with you, on both points. Pyrotec (talk) 19:29, 11 April 2013 (UTC)
In the first paragraph, the sentence "[...] Evidence of cooked food is found from 1.9 million years ago [...]" lacks citation. There is evidence of cooked food from 1 million years ago. Request to make the appropriate edit and add a reference. The article is semi-protected. — Preceding unsigned comment added by 2605:6000:1603:C00C:15A9:269A:1337:C7DF (talk) 06:41, 17 June 2014 (UTC)
Need to discuss seriously, the reactions of of fire. Those are irreversible. Man is the only species to use the fire in direct & indirect manner.' The oxygen is consumed during fire and the carbon dioxide with other gases is produced. The carbon is temporarily utilized by trees,ocean. The important aspect to consider is : When the wood is used or decomposes when tree is dead, the carbon is released again in the atmosphere.
Thus the use of fire should minimized. Life can be more comfortable. As fire destroys the valuable properties of the given substance,the quality is reduced. Reducing the use of fire seems to be the chief remedy to all man made maladies responsible for the current & impending evils on the living & non living on our planet. — Preceding unsigned comment added by Drkabra (talk • contribs) 00:42, 26 January 2014 (UTC)
It is unclear what point you are trying to make. Please keep your discussion limited to specific thoughts on how to improve the article. Thank you. Cyphoidbomb (talk) 01:10, 26 January 2014 (UTC)
It can be intelligent information, only if we had more sources. OccultZone (talk) 08:02, 28 January 2014 (UTC)