This condition is thought to be linked to very high doses of diacetyl, but the condition can also develop from a variety of other chemicals such as: acetaldehyde (a chemical found in marijuana smoke), metal oxide fumes (by-product of welding), formaldehyde (a chemical present in cigarettes), sulphur dioxide (a pollutant released by burning fossil fuels), ammonia, chlorine, nitrogen oxides, hydrochloric acid and sulphur mustard
Last year, the World Trade Organization found the U.S
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