By Michael Franco A new report and video show how dust from an ancient lakebed in Africa is critical to plant growth on another continent.

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Source:: http://cnet.com.feedsportal.com/c/34938/f/645093/s/43d69866/sc/7/l/0L0Scnet0N0Cnews0Cnasa0Eimages0Eshow0Eequivalent0Eof0E689290A0Edust0Efilled0Esemis0Emoving0Efrom0Esahara0Eto0Eamazon0C0Tftag0FCAD590Aa51e/story01.htm