Air pollution has always been a big deal, but the pandemic was a catalyst for many of us to start thinking about the air–and what’s in it–much more seriously. More than four years after Covid-19 first struck, air quality remains a topic of major consideration, particularly once fire season starts. Is your air dirty? Should you try to clean it? If so, how? Air purification is a confusing topic that merits a deep dive. Besides walking you through the basics, we’ll also tick off the six most common–and most dangerous–airborne pollutants, from smog and soot to carbon monoxide to lead. The question…