New type of ultraviolet light makes indoor air as safe as outdoors
&quot;safe&quot; in this context is virus safe. Can have a pretty good application for places where virus transmission is an issue, as long as people like me don&#x27;t feel an unease about being bombarded with UV 10 hours a day.<p>When I think of &quot;Safe&quot; for air, I also think of PM2.5 and other airborne compounds. A more permanent fix to make the air fully safe is improving building ventilation.