This week we've got a two-question lightning round for you. First, reporter Pauline Bartolone investigates whether the growing popularity of zero emission vehicles is making a noticeable difference in Bay Area air quality. Then, video producer Anna Vignet looks into the history of a bridge with a strikingly similar appearance to the Golden Gate Bridge... in Portugal.

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These stories was reported by Pauline Bartolone and Anna Vignet. Bay Curious is made by Olivia Allen-Price, Amanda Font, Christopher Beale, Brendan Willard and Jim Bennett. Additional support from Cesar Saldana, Jen Chien, Katie Sprenger, Jasmine Garnett, Carly Severn, Jenny Pritchett and Holly Kernan.