Vanilla is the second-most lucrative spice crop in the world, selling for around $600 a kilogram, and Sydney inventor David Soo's space-aged greenhouse lets him grow it three times faster than in a plantation environment. The innovative vanilla farm that looks like something from a sci-fi movie

Vanilla is the second-most lucrative spice crop in the world, selling for around $600 a kilogram, and Sydney inventor David Soo's space-aged greenhouse lets him grow it three times faster than in a plantation environment.

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