Ralph welcomes Jerry Cox, author of “Killer Air Bags: The Deadly Secret Automakers Don’t Want You to Know,” his insider account of how the Takata company made airbags that were essentially equipped with pipe bombs of ammonium nitrate. And the former executive director of Greenpeace, Peter Bahouth, comes on to rail against that noisy, polluting scourge of the suburbs: the leaf blower. Plus, Ralph answers your questions.

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