Altitude and temperature effects on growth
This topic explores how altitude and temperature shape coffee growth, yield, and flavor, explaining why terroir is central to coffee’s identity and quality.
High altitude
Genus Coffea and major species overview
This topic introduces the genus Coffea, explains its major species, and outlines their biological traits, cultivation differences, and global significance.
Spread through Yemen and Sufi coffeehouses
In this topic we trace how coffee moved from Ethiopia across the Red Sea into Yemen, why Sufi communities adopted it, and how Yemen’s ports and pilgrim networks transformed a local devotional drink into a global commodity.