NPR's Noel King talks to California Gov. Gavin Newsom about why it's important for his state to keep its stringent auto emission standards, as the Trump administration tries to roll them back.
California Vows To Take Trump To Court Over Emissions Standards
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NPR's Ari Shapiro and Michel Martin are joined by NPR's science correspondent Jon Hamilton to talk about the information about the coronavirus learned since the beginning of the pandemic.