For example, the Blue Pure lacks a display to indicate air quality, sensors for automatic adjustment, a timer and scheduling capabilities
Clearing the air in airports According to the CDC exposure to secondhand smoke has been steadily decreasing in the United States, due primarily to the adoption of smoke-free policies prohibiting indoor smoking at worksites, restaurants and bars
Photograph: Ethan Swope/APAre wildfires getting worse?Even as the planet has heated up, the area torched by fires has fallen
"Less optimal tumor control outcomes among smokers could possibly be explained by the influence of less oxygen concentration within the treated tumors among smokers, which is known to lead to less sensitivity of the cells being killed off by radiation treatments," said study author Michael Zelefsky, MD, of the Memorial Sloan Kettering Cancer Center, in a statement