Study finds higher homicide risk in homes with handguns

NEW YORK — Most U.S. gun owners say they own firearms to protect themselves and their loved ones, surveys show. But a study published Monday suggests people who live with handgun owners are shot to death at a higher rate than those who don’t have such weapons at home.

WHO says 99% of world’s population breathes poor-quality air

GENEVA — The U.N. health agency says nearly everybody in the world breathes air that doesn’t meet its standards for air quality, calling for more action to reduce fossil-fuel use, which generates pollutants that cause respiratory and blood-flow problems and lead to millions of preventable deaths each year.