Take our quiz to find out just how much pollution is affecting your skin—and how to fight back with targeted treatments:1. Which locale do you call home?A. The cityB. The suburbsC. A rural area2. How often do you find yourself on or near a highway or busy roadway?A. All the time—even my running route is in a high-traffic area.B. Only when commuting to and from work.C. Rarely. I stick to green spaces.3. Google time: How far away is the nearest coal-fired power plant?A. Within 50 milesB. Within 100 milesC. More than 200 miles4. Do you ever warm up in front of a roaring fire during winter?A. Of course—I keep a stack of wood at the ready!B. I do occasionally.C. I don’t even have a fireplace.ANSWERS:Mostly A’sTreatment need: HighCleansing is a top priority. A sonic brush like Clinique Sonic System Purifying Cleansing Brush ($90, clinique.com) can help clean pores, and a vitamin C serum and heavy-duty moisturizer counteract drying smog.Mostly B’sTreatment need: MediumCleanse daily, then fight free radicals from pollution with an antioxidant like Drunk Elephant C-Firma Day Serum ($80, drunkelephant.com). If you have dry skin, smog exacerbates the problem, so moisturize often.Mostly C’sTreatment need: LowAdd a deep-cleansing mask to your routine every other week, and don’t skip that antioxidant serum, which also protects against other environmental skin-stressors. A lightweight moisturizer is likely all you need.Source: Elizabeth Tanzi, codirector of the Washington Institute of Dermatologic Laser Surgery MORE: 10 Smoothies For Pretty Skin