Why one of Asia's poorest countries grows Japan's cash

Japan has long harvested a shrub called mitsumata for its money supply. But when mitsumata started dying out, Japan frantically searched for alternatives to make yen. It found a lifeline in the foothills of the Himalayas. A low-value crop called argeli grew abundantly and served as a perfect replacement for mitsumata. Argeli was worth very little and was often the only option for farmers who'd lost their crops to wild animals. When the Japanese arrived, they turned the once low-value argeli i...