On October 26, 1948 smog, that was confirmed to be fatal, had encompassed a small town named Donora, located in Pennsylvania. The majority of these residents were used to the smoke that had emerged or arose due to a local zinc smelter. However, on this day there was an adjustment in temperature and a deficiency of wind that confined a deadly mixture of sulfur dioxide, carbon monoxide, and metal dust. This toxic mixture ends up remaining in the air for five days. Forlornly, due to this environmental disaster, 20 residents had lost their lives and 7,000 other residents agonized from conditions such as: nausea, vomiting, headaches, abdominal cramps, and choking or coughing on blood. Numerous of firemen had been bearing oxygen tanks in the streets
