Air pollution can cause inflammation in your small intestine. This inflammation occurs when air pollution particles enlarge the pores of your small intestine, which can lead to bacteria and other infections in the intestine.
 
The main reason for this is the dirt around you, which can carry air pollution toxins into your body with your breathing and cause infection.
 
In a study, it has been found that due to pollution particles in the small intestine, the bacteria are not digested properly, due to which chemicals are released in the urine. In case of kidney failure, blood is filtered to remove waste materials, this is called dialysis.