She has urged farmers to start growing sweet potatoes, a hardy crop in vogue in urban kitchens.

她敦促农民种植红薯，红薯这抗寒作物在城市厨房中正时兴。

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This year's drought has made planting crops impossible for many farmers - even a hardy crop such as cotton, that needs little water.

今年的干旱使农民的许多庄稼没有收成——甚至包括一些不太需要水的耐寒作物如棉花。

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In this episode, Richard Quest finds out what motivates today's hardy crop of explorers and uncovers the madness that drives them to boldly go where no one has gone before.

CNN: Quest for exploration