Masks Can Also Make a Difference
Since breathing polluted air can be harmful, limiting the amount of pollution you inhale can reduce your risk of health problems. You just have to make sure that they can prevent you from breathing in small particles.
Look for options that can block PM 2.5. Otherwise, the filter might not be able to prevent you from inhaling those particles.
Additionally, masks that seal around the mouth and noise are more effective. Since there isn’t a gap around the edges, particles can’t as easily make their way around the filter.