Coffee is one of the world’s most popular drinks. To produce coffee, only the bean itself needs roasting.
To reach the bean, growers remove the husk, which is a tough outer shell, and the silverskin, which is a thin skin that covers the seed.
They tend to leave the husks, in particular, in the field.
These abandoned coffee byproducts contain chemicals such as caffeine, tannins, and chlorogenic acid, which can be hazardous to the environment.