How extreme heat is damaging American transportation

How extreme heat is damaging American transportation infrastructure

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Scientists say much of the persistent and dangerous heat blanketing wide swaths of the country is a long-term result of greenhouse gas emissions. Climate scientist Kristina Dahl joins John Yang to discuss how it's affecting everything from the power grid to trains, planes and automobiles. PBS News is supported by - https://www.pbs.org/newshour/about/funders

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