The Food and Drug Administration said a new e-tobacco device is less harmful than cigarettes, but a panel will still have to review that claim.
The American Lung Association says states are failing to enact policies to prevent smoking, but there are fewer smokers in the U.S. than ever.
The Philippine Institute for Volcanology and Seismology raised the alert level for the Mayon volcano after it "noticeably increased its unrest."
A spokesperson for the airport told reporters the wind blew away the thick ash that has been spewing from Mount Agung for days.
Indonesia's national disaster agency has raised the alert for Mount Agung to the highest level after it started erupting early last week.
As of Friday, 10 counties had air quality that the Environmental Protection Agency considers "unhealthy."
Lots of studies have found links between e-cigarette use and tobacco addiction, but some warn that those links aren't all that strong.
Champagne releases a trail of vapor when opened, but scientists studying the phenomenon say they know why that vapor can sometimes be blue.
Officials in Crosby, Texas, said chemical reactions, not explosions, caused the fire and smoke at the Arkema chemical plant.
Cigarette taxes can raise money while getting people to quit smoking. But researchers say doing this can cause more people to enroll for food stamps.
A growing wildfire burning in southwest Utah is causing hazy skies in Colorado.
A large plume of smoke near the interchange of Interstate 25 and Interstate 70 marks the spot where a fire flared up at a recycling plant Wednesday.