How states are fighting for cleaner air.
As many as 400 Oregon residents are estimated to die prematurely every year from exposure to diesel exhaust, a toxic carcinogen and a contributor to climate change. While new vehicles have emission requirements, there are no regulations for the older diesel engines still in use. Special correspondent Cat Wise reports on the ways Oregon is trying to tackle the problem.
AIR DATE 1/31/18
PBS NewsHour provides in-depth analysis of current events with a news summary, live studio interviews and discussions of domestic and international issues. Amna Nawaz and Geoff Bennett co-anchor.
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