With levels of sooty air pollution far too high across swaths ... their central Los Angeles neighborhood. She wore a black face mask, hoping to protect herself, she said. “It’s better to ...

Now that masks are optional on every major US airline ... Airline companies argued that effective air filters on modern planes make transmission of the virus during a flight highly unlikely.

Southern California chokes under hazardous air as wildfires rage ... She wore a black face mask, hoping to protect herself, she said. “It’s better to be safe than sorry,” said Fagel ...