Lethal farts.

How the bloody hell am I meant to know that? What do you want me to do, trap it in some tuperware and measure the pH?! I don't mind putting in some effort for an accurate answer, but geez!

Mine always smell of strawberries and spice and all things nice.

THIS DEPENDS ON WHAT I EAT AND DRINK ! sometimes I fart "something that crawled up inside me and died ! Phew !!!

Methane burns blue. Answer 1) So, if you reduce carbon based foods in the presence of hydrogen (water), and when you light your farts they explode blue, then you fart methane, likely you are a herbivore. Answer 2) So, if your farts stink like sulfur, rather than methane, and burn blue, you are a carnivore. See http://www.heptune.com/farts.html for the best non-science on farts. For the young chemists out there, its all very simple ... Redox (shorthand for reduction-oxidation reaction) describes all chemical reactions in which atoms have their oxidation number (oxidation state) changed. This can be either a simple redox process such as the oxidation of carbon to yield carbon dioxide or the reduction of carbon by hydrogen to yield methane (CH4). Though sufficient for many purposes, these descriptions are not precisely correct. Oxidation and reduction properly refer to a change in oxidation number — the actual transfer of electrons may never occur. Thus, oxidation is better defined as an increase in oxidation number, and reduction as a decrease in oxidation number. In practice, the transfer of electrons will always cause a change in oxidation number, but there are many reactions that are classed as "redox" even though no electron transfer occurs The chemical way to look at redox processes is that the reductant transfers electrons to the oxidant. Thus, in the reaction, the reductant or reducing agent loses electrons and is oxidized, and the oxidant or oxidizing agent gains electrons and is reduced. The pair of an oxidizing and reducing agent that are involved in a particular reaction is called a redox pair. Substances that have the ability to reduce other substances (hydrogen has the ability to reduce carbon) are said to be reductive and are known as reducing agents, reductants, or reducers. Put in another way, the reductant (hydrogen) transfers electrons to another substance (carbon), and is, thus, oxidized itself (methane is produced). And, because it "donates" electrons it is also called an electron donor. Methane burns blue. Answer 1) So, if you reduce carbon based foods in the presence of hydrogen (water), and when you light your farts they explode blue, then you fart methane, likely you are a herbivore. Sulfur burns with a blue flame that emits sulfur dioxide, notable for its peculiar suffocating odor due to dissolving in the mucosa to form dilute sulfurous acid. Hydrogen sulfide has the characteristic smell of rotten eggs. Not all organic sulfur compounds smell unpleasant; for example, grapefruit mercaptan, a sulfur-containing monoterpenoid is responsible for the characteristic scent of grapefruit. Primitive bacteria which live around deep ocean volcanic vents oxidize hydrogen sulfide in this way with oxygen: see giant tube worm for an example of large organisms (via bacteria) making metabolic use of hydrogen sulfide as food to be oxidized. The so-called sulfur bacteria, by contrast, "breathe sulfate" instead of oxygen. They use sulfur as the electron acceptor, and reduce various oxidized sulfur compounds back into sulfide-- often into hydrogen sulfide. They also can grow on a number of other partially oxidized sulfur compounds (e. g. thiosulfate, thionates, polysulfides, sulfite). These bacteria are responsible for the rotten egg smell of some intestinal gases sulfur is readily available in protein foods-meats, fish, poultry, eggs, milk, and legumes are all good sources. Egg yolks are one of the better sources of sulfur. Other foods that contain this somewhat smelly mineral are onions, garlic, cabbage, brussels sprouts, and turnips. Nuts have some, as do kale, lettuce, kelp and other seaweed, and raspberries. Answer 2) So, if your farts stink like sulfur, rather than methane, and burn blue, you are a carnivore. You can light your farts either way. If the flame is blue, you are a carnivore, yellow and you are an herbivore, more or less. See http://www.heptune.com/farts.html for the best non-science on farts.