what are some combustable materals found in nature?
101795
Oil\nwood\nleaves\nmethane\njust about any vegetation\nfat (like whale oil or blubber)\nnatural gas\ncoal\ntar\npeat (actually a form of coal)\nalcohol (from fermented vegetation or nectar)\netc
233656
A substance that spontaneously ignites on contact with air is called a pyrophoric chemical.  There are lots of them.  Many are organometallic compounds.  \n\nSome examples include: diborane, diethylzinc, tert-butyllithium, and diphosphine.
905494
becos the paper u r burning may contain\nCopper sulfate\nBorax (Sodium borate)\nEach metal has a characteristic flame color which has been found to be useful in identifying minerals.
342489
Deep ocean zone. Usually associated with hydro-thermal vents or volcanic activity. As for a marketable source of the mineral, perhaps someday. However, as manganese is still readily available above water, under water mining costs make the nodules much to expensive to gather commercially.
230570
Mafic lava is very hot and flows easily it contains less silica and are enriched in iron (Fe), magnesium (Mg), and calcium (Ca) and just encase your trying to get a homework answer I will leave it at that if not you will know what I mean ;)
1025824
There are a couple of naturally occurring ferromagnetic substances, like magnetite (Fe3O4) or nickel-iron from comets, which can act as permanent magnets. The metals iron, nickel and cobalt all exhibit ferromagnetism and can be magnetized. Oxide minerals from these elements may be ferromagnetic, too.
773647
The creation and or discovery of fire.
560127
Carbon monoxide (CO) from cars, buses, forest fires...\nSulphur dioxide (SO2) from factories\nCarbon particles (C) from forest fires, burning of rubbish...\nVolcanic ash blown by the winds throughout the volcanic region
948473
Can't answer this one accurately with the limited information you gave. What is being burned? Under what conditions is it being burned?  When you're talking of by products as opposed to products, the composition of the combustible material enters the equation. If you are burning a pure hydrocarbon fuel such as methane the products  are water vapor and carbon dioxide. Depending upon the conditions under which it was burned you might also get carbon monoxide. If the combustible material contained sulfur, nitrogen or other elements you might get gases such as sulfur dioxide or nitrous oxide as well.
437369
spontaneous human combustion\nhttp://en.wikipedia.org/wiki/Spontaneous_human_combustion
981635
"These substances" refers to what?\n\nThe product of combustion include the oxides of carbon-mono and di, water vapor, unburned hydrocarbons and mineral ash.
504908
(1) The natural elements are the elements which nature makes. They are:\na) Minerals \nb) Calcite .\nc) Halogens, \nd) Noble gases \n\nThe natural elements are produced by the nature with the help of a natural process. They have very long lives and they are stable. \n\n\n(2) Man-made elements are called synthetic elements and they are made by people. They are;\na) Steel \nb) Plastics \nc) Ceramics \nd) Adhesives.\n\nThe synthetic elements are produced in laboratories and with the help of  radioactive process. They have very short lives . They are unstable.
779894
AlthoughO2 is a strong oxidizing agent, its oxidizing reactions are usually slow kinetically. Many flammable materials will exist in the presence of air until a flame or spark starts the reaction. The very electronegative nonmetals are poor reducing agents. \n\nF2 will oxidize all metals and most other substances. It must be stored in either nickel or copper containers because the fluorides of these metals form a film passivating the metal surface. \n\nFor more please visit:\nhttp://www.wou.edu/las/physci/ch412/nonmetal.htm
552288
rocks are made up of minerals
565832
Condesates formed under high temp. and pressure can reach flash points suddenly. They usually combust with a flame whose characteristics depends on the material.\n\nIt can be used as reaction indicators or flashes.
139636
Electromagnets are made out of metal that can easily be magnetized by applying DC voltage. Electromagnets do not occur naturally in nature but are manmade. Their magnetism can be turned on and off.\n\nPermanent magnets occur naturally in nature.
702930
certainly NOT He!\n\nThe main one is water... along with other common volatiles CO2 and Cl.  As these increase, so does explosiveness.\n\nHigher silica lavas are more likely to be explosive.