Summer is (finally) done and as the cooler months approach, one county agency is working to clear the air while spreading cheer this holiday season. With the monsoon fading into the rear-view, oncoming colder weather typically hurts air quality and raises risks for some vulnerable residents — especially when smoke from wood-burning fireplaces adds to the mix. Bob Huhn, a spokesman for the Maricopa County Air Quality Department, explained that while pollution advisories are less common in the summer, cooler weather leads to greater health concerns and more frequent no-burn announcements. “We have no-burn restrictions all through the summer. However, when we have no-burn days, it’s what most people talk about. It’s mostly in the winter, because that’s when people are more likely to do wood-burning activities,” he said. This summer, pollution levels improved compared to previous seasons, according to Richard Sumner, a professional engineer and permitting division manager at MCAQD. “September was another outstanding month for PM 2.5 emissions,” Mr. Sumner stated. “For the month, the concentrations were 18% below the previous three-year average for September. On a year-to-date basis,...