The Sacramento region’s air quality reached “unhealthy for sensitive groups” level on Thursday morning, according to IQAir.

Aerosols vary in composition, size, concentration, and source. They profoundly affect climate, visibility, human health, and biogeochemical cycling. Particle sizes are determined by the mechanism ...

I have a health goal for the new year that doesn't require me to get out of bed earlier or eat fewer cookies. I am an ...