KCBS Radio, KPIX-5, and Chronicle Insider Phil Matier speaks on California's complicated relationship with the Clear Air Act and Governor Newsom's response to this threat from President Trump.

<p>KCBS Radio, KPIX-5, and Chronicle Insider Phil Matier speaks on California's complicated relationship with the Clear Air Act and Governor Newsom's response to this threat from President Trump.</p>

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