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Kathy Willis, Director of Science for Kew Gardens in London, UK, talks about the science and importance of "Ensete ventricosum", aka the false banana plant. About 15 of these drought-resistant plants will feed a family of five for a year.

(Image: Banana plant, Credit: Â鶹¹ÙÍøÊ×Ò³Èë¿Ú.)