Fire smoke The composition of them Gaseous mixture "fire smoke" varies according to the fuel and conditions. A well-oxygenated, outdoor wood fire nay produce a very light smoke with relatively few chemicals. Although there are particulates in wood smoke capable of causing low-level inflammation, this type of exposure rarely requires medical attention. Toxic fire smoke, however, is the result of a fire when the fuel load is more complex (e.g plastics, artificial facbrics) or the oxygen supply us limited. Structure fires are usually the primary concern when we consider smoke inhalation, but toxic fire smoke is also created at trash bin/dumpster and automobile fires. Wildfire smoke can also be toxic if the burning area was recently sprayed with chemicals. Chemicals are released from incomplete combustion and from the off-gassing of glues used in the manufacturing process. Also contained within fire smoke are small Inhalable particles known as fines and ultrafine. T...