The smaller particles could in fact be more harmful as they can get through the body's natural defenses and cause significant ...

A major nuclear attack would kill up to 250 million Americans, roughly 75% of the country’s population. While Iran does not ...

Air pollution is a serious and often underestimated health threat in the U.S. It is linked to over 50,000 premature deaths each year. Tiny particles in the air, like PM2.5, can get embedded into a ...

Air pollution causes health problems and is attributable to some 50,000 annual deaths in the United States, but not all air ...