Another good news for coffee drinkers and environmentalists:
The impact of coffee on biodiversity has been intensively studied, particularly in Latin America. The conclusion of most, but not all, of those studies is that biodiversity impacts increase as more intense farming techniques are used. Truly rustic coffee, where coffee plants are grown interspersed with forest trees and understory, has the least impact on vegetation and birds. Shade-grown monoculture is a slightly more intensive technique, farming larger densities of coffee plants underneath the forest canopy. This impacts biodiversity more than rustic coffee, but still far less than sun coffee, which involves clearing the forest like a traditional farm, removing epiphytic plants from the coffee plants, and applying chemical fertilizers.