Not only can air pollution build up on top of our strands and cause them to, in turn, appear dull, lackluster, and dirty, but it can also contribute to more serious side effects, including hair loss. Here’s what you need to know. Air pollution doesn’t just affect your scalp, but it can also build up on your actual hair, ultimately making it feel (and look) dirty, dull, and weighed down. The dust, fumes, dirt, and daily grime you encounter on a daily basis actually builds up on each strand—just as it does on your skin if you don’t properly cleanse it off. In regard to air pollution, one of the best ways to care for your scalp is by using a weekly scalp scrub. Using a weekly exfoliant will help slough off any buildup of air pollution, as well as dead skin cells, oil, and excess product. Don’t just reach for the first scalp scrub you find, however. Rather, take a minute to determine the right scalp scrub for your own hair type and scalp (just as you would when seeking out a new product for your skin).