Tips to clear the air  and find your way to better health Animal dander, dust mites, mould, pollen—it’s all right there in the air, not to mention your bath towels, bedding, and furniture. These particles can exacerbate respiratory symptoms, bronchitis, and asthma for people with such conditions. It’s no wonder that of respondents to a 2016 survey by Harvard’s Joint Center for Housing Studies who reported having healthy-home concerns; almost 70 percent cited indoor air quality as their top worry. There’s no silver-bullet solution, but these do-it-yourself measures will go a long way toward easier breathing. Control Moisture Use an air conditioner (with a clean filter) or a dehumidifier to help keep things dry in the basement and other damp spaces, where mites and mold tend to thrive. Air It Out Open windows when weather permits and turn on exhaust fans at other times to remove indoor pollutants. You can also use portable or whole-house air purifiers that have a clean-air deliver...