Skies appear to be clear, but cold air near the ground is trapping pollutants and creating a health hazard. San Francisco declared a smog alert this morning- the eighth since December 7th- asking that people bike, take public transportation, or in keeping with the season, reindeer carpools. This means no cozy wood fires or backyard BBQ smoking today, however the alert gives no guidance on menorah use. [SF Gate, Photo Credit Morgan Jones/511 Contra Costa]
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