A new study shows the switch resulted in a dramatic drop in toxic air pollutants on board trains and around major transit ...

Good news: Air quality in San Francisco is improving, according to an Axios analysis of year-over-year EPA data. Why it matters: Long-term exposure to poor air quality is harmful to your health.

Switching from diesel to electric trains dramatically improved the air quality aboard the San Francisco Bay Area's Caltrain commuter rail line, reducing riders' exposure to the carcinogen black carbon ...

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San Francisco ranks ninth in consumer sentiment among U.S. metros, with 40% expecting better personal finances in the next ...

UC Berkeley postdoctoral scholar Samuel Cliff (left) and professor Joshua Apte at the San Francisco Caltrain Station. Each is holding one of the portable air quality monitors that they used to measure ...

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