Studies have shown that your bedroom may contain air that is 60 percent more polluted than outside air. This is commonly due to the bedroom being a sealed environment with poor ventilation. The fact that you are breathing this air in while you are sleeping (which is approximately 1/3rd of your life) can have some very negative consequences. If your bedroom has poor ventilation, consider getting an air purifier that will clean up some of the air that you are breathing in.