The world's most expensive spice threatened by climate change

The world’s most expensive spice appears in the written record as early as 2300 BCE, and is revered by cultures around the globe. It takes between 70,000 and 200,000 flowers to produce just one kilogram of dried saffron threads. But the precious and sacred plant is under serious threat from climate change.

Guest: Nina Elkadi, Plant Humanities Fellow at Dumbarton Oaks, Harvard