October 14, 2019, 8:26 a.m. by Russell McLendon
A new study explores how social interactions affect our well-being.
Ozone: Health and environmental effects
February 6, 2009, 11:57 a.m.
Ground-level ozone can have detrimental effects on humans, plants, and ecosystems. Learn more.
February 6, 2009, 11:27 a.m.
Learn about mercury, where it occurs, how it can be dangerous and more.