4 Your Health: Positive attitude could help increase life expectancy

(NBC News)- Keeping a positive attitude could help you stay healthy and live longer, according to a new study from Mount Sinai Hospital in New York.
Researchers tracked nearly 230,000 people for about 14 years.
They found optimism was associated with a lower risk of heart attack, stroke and early death.
Air pollution link to increased risk of infant death in children
New research from the U.K. links air pollution to an increased risk of infant death and lung problems in children.
Scientists stud