Nation Sep 29

Watch 4:32
How Volkswagen got caught cheating

How did Volkswagen get caught rigging the emissions software of its diesel vehicles? William Brangham talks with John German of the International Council on Clean Transportation, one of the engineers who helped catch the automaker.

Nov 26

Obama administration aims to set stricter ozone emissions

WASHINGTON — The Obama administration took steps Wednesday to cut levels of smog-forming pollution linked to asthma, lung damage and other health problems, making good on one of President Barack Obama's original campaign promises while setting up a fresh confrontation…

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