The first article in this series on coffee covered its early roots and routes. Coffee has planted itself all over the globe from the forests of Africa to the Middle East, the Indian Ocean Islands, South and Southeast Asia and the tropical Americas. Nearly all the commercial coffee varieties (97%) that grow globally are derived from either Coffea arabica or Coffea robusta. But how do different coffee varieties emerge? What are some of the favored varieties? Before the green beans are roasted, what are the factors that affect quality? How can someone roast coffee beans at home? Read more…