Negotiators have agreed to a global phase-out of chemicals that run some air conditioners and refrigerators, but are also big contributors to global warming. That has countries and researchers scrambling to come up with clean and affordable alternatives.
Geeking out to help end global poverty. (That's meant with the highest respect for geeks.) Tapping great minds to help the world's poorest, Shashi Buluswar leads the Institute for Globally Transformative Technologies at Lawrence Berkeley Lab in Berkeley, California.
Researchers believe that artificial photosynthesis that sucks excess CO2 out of the air could one day help fight climate change. But capturing the gas is only half the challenge. The other half is what to do with it once you've got it. Lauren Sommer reports on a potentially breakthrough technology that uses artificial photsynthesis to turn CO2 from the air into industrial chemicals and natural gas.
A brother and sister remember their abrupt start to a new life in America after they fled collapsing South Vietnam. It's one story among the many collected by StoryCorps from Vietnamese refugees whose lives were changed by the fall of Saigon in 1975.
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