Inhalation of magnesium oxide fumes can cause metal fume fever. This pungent colourless toxic gas forms white fumes in moist air. Heating produces highly toxic mercury fumes and oxygen, which increases the fire hazard. Fourteen of the crew were killed by inhalation of smoke or toxic fumes. Willie attempts suicide by inhaling vehicle exhaust fumes. These noxious fumes include dioxins and furans. Brazing may entail exposure to hazardous chemical fumes. This helps reduce toxic fumes that are released from vehicles. Inhalation of bleach fumes can damage the lungs. Dr. Marjorie Clarke also warned of the consequences of breathing toxic dust and fumes. Consider diesel fumes belched from an exhaust pipe. Weaver briefly suffers a seizure after being exposed to the toxic fumes. A local doctor said the noxious fumes were unhealthful. They are regularly used for abating solvent fumes, odours, etc. The engines were also noisy and prone to unacceptable levels of smoky exhaust fumes.