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Extensive research reveals the CDC's weekly publication drew unsupported conclusions about mask effectiveness based on ...

Air pollution does not have to exceed federal limits to potentially harm human health, according to a new published study ...

New research offers a cautionary tale about the difficulty of removing ‘forever chemicals’ from the environment.

Cal Fire said forward spread of the fire has been stopped.

Anticipating Opera Parallèle’s latest—as the Pope rails against AI. Plus: SF Opera's upcoming streams, and a new SF Symphony ...

As smoke from Canadian wildfires covers a wide swath of New York, Gov. Kathy Hochul announced on NY1 that 1 million N95 masks will be made available for New Yorkers Thursday. “We think that the N95s ...

The National Weather Service issued an air quality alert for southeast Wisconsin June 3. Wind and sunlight are trapping extra ozone on ground levels.

Internal text messages showed a manager asked to change marketing materials to say products ‘are testing’ for the virus, ...

Selected Tops supermarkets will offer free boxes of N95 masks beginning Tuesday. The masks, offered in partnership with ...

After weeks in a federal quarantine, Dr. Stephen Kornfeld is back in Central Oregon finishing a 42-day quarantine period with ...

Hedwig and the Angry Inch' at NCTC cranks things up and down. Plus: The colorful drama of SFMOMA's 'Woman in a hat' ...