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California wildfire smoke may rise to practically unbearable levels in next decades
Bay Area air quality officials seeking tougher regulators against East Bay Valero refinery
Is air quality getting worse in the Bay Area?
Yoohyun Jung • yoohyun.jung@sfchronicle.com • @yoohyun_jung
Sarah Feldberg • sarah.feldberg@sfchronicle.com • @sarahfeldberg
Hilary Fung • hilary.fung@sfchronicle.com • @hil_fung