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Inhale. Now exhale. Notice anything different? Our response to the virus is changing the air in unexpected ways. A pandemic-driven pause on travel has produced clear skies and a world-wide air quality experiment. And a new study reveals that hundreds of tons of microplastics are raining down on us each day.\xa0\nBut we can improve the quality of the breaths we do take; engineers have devised a high-tech mask that may kill coronavirus on contact. Plus, although you do it 25,000 times a day, you may not be breathing properly. Nose-breathing vs mouth breathing: getting the ins-and-outs of respiration.\nGuests:\n\n\nJanice Brahney\xa0-\xa0Environmental biogeochemist at Utah State University\n\n\nSally Ng\xa0-\xa0Atmospheric scientist, chemical engineer at Georgia Tech.\n\n\nChandan Sen\xa0-\xa0Professor, department of surgery, Indiana University School of Medicine.\n\n\nJames Nestor\xa0-\xa0Author of \u201cBreath: The New Science of a Lost Art.\u201d\n\n\nLearn more about your ad choices. Visit megaphone.fm/adchoices