Occupational exposures constitute the highest risk of toxicity and it is often high for farmers especially those that deal with food grains. It is equally high for firefighters and military personnel, especially those officers that deal in explosives. The risk is also high for arc welders, traffic officers, aerospace staffs and miners as well as those people whose occupations are connected with the nitric acid. Silo-filler's disease is a consequence of exposure to<unk>  by farmers dealing with silos. Food grains such as corn and millet, as well as grasses such as alfalfa and some other plant material, produces<unk><unk>  within hours due to anaerobic fermentation. The threshold concentrations of<unk><unk>  are often attained within 1 to 2 days and begin to decline gradually after 10 to 14 days but if the silos is well sealed, the gas may remain in there for weeks. Heavily fertilized silage, particularly the ones produced from immature plants, generate a higher concentration of the gas within the silo.<unk><unk>  is about 1.5 times heavier than air and during silage storage,<unk><unk>  remains in the silage material. Improper ventilation may result in exposure during the leveling of the silage.
Nitrogen dioxide poisoning
Carbon monoxide poisoning
Chlorine gas poisoning
Organophosphate poisoning
Oxygen toxicity
Cyanide poisoning
Barbiturate overdose
Nitrogen narcosis