Geo-engineering with Professor David Keith
Air Date: Mar 28, 2014 12:00 AM ET
Harvard scientist David Keith on why,despite the risks, we must investigate shooting particles of sulphate into the stratosphere, to combat climate change.
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Two women from different backgrounds find ways to succeed in their own fields and then use their success to give back to their community. It's part of the grassroots initiative called HERstory in Black, bringing together 150 black women to share their personal experience