Climate change threatens South Africa's rooibos tea

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The annual rooibos harvest in South Africa's Western Cape helps quench the world's growing thirst for "red bush" tea, but farmers fear that climate change could destroy the delicate eco-system that their crop depends on. The tea is popular for its perceived health benefits as well as its refreshing taste, containing no caffeine and just a tiny amount of tannin. Duration: 02:17

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