All around the United States, there are tons of factories, but more specifically in Chicago, factories are hazardous because they have all of these toxic chemicals released into the atmosphere and once we breathe in anything from the atmosphere such as oxygen or CO2, but once those toxic chemicals are already in the atmosphere and we breathe in those chemicals which cause our lungs to become more weaker, and once we keep doing this repeatedly, then our lungs get stuffed with these chemicals and they the lungs are starting to cause you to have trouble breathing and if this continues to happen then it is possible that you can get this one disease that is specifically in the lungs and it is called asthma.

PM 2.5 is very unhealthy for our lungs to breath and PM 2.5 stands for Particulate Matter less than 2.5 microns in the diameter, and then whenever we breathe in those particles, they penetrate our lungs and once this happens over and over again then our lungs get stuffed with all of these hazardous chemicals can potentially cause lung diseases such as asthma, bronchitis and emphysema.