Before a roaster ever sees it, a coffee bean has survived years of farming, fermentation, milling, and sorting. Coffee is grown in about 70 countries by roughly 100 million people, with Latin America producing almost 60% of Arabica and Vietnam leading Robusta. A new tree takes five years to give a useful harvest. Strip picking pulls ripe and unripe cherries together, and unripe fruit becomes Quakers, pale beans that taste like cardboard, so selective picking every eight to ten days matters. About 80% of coffee comes from holdings under two hectares, and pickers paid by the kilo earn as little as two to 21 cents per kilogram in Colombia.

The episode then compares processing: natural drying of whole cherries, washed coffee fermented 12 to 36 hours to strip mucilage, honey process that leaves mucilage on to sweeten the bean, carbonic maceration in CO2 tanks, and Indonesia’s wet hulled giling basah. Wet processing turns 80% of the harvest into waste and can pollute rivers, prompting biogas and husk reuse. Dry mills hull, grade peaberries, blow off light beans in a catador, and fire air jets at defects, though Ethiopia and Tanzania still sort by hand. It ends with monsooned Malabar and decaf.

• Median seasonal earnings run about $20 a month in Ethiopia and $350 in Costa Rica.
• The US Department of Labor flags coffee from 17 countries for child or forced labor.
• Traditional washing uses 20 to 100 cubic meters of water per ton of green coffee.
• A 2021 health review found hand sorters, mostly women, face high dust related respiratory illness.
• The Swiss Water Process soaks beans in flavor saturated green coffee extract so only caffeine diffuses out.