Fair trade certified commodities must adhere to sustainable agro-ecological practices, including reduction of chemical fertilizer use, prevention of erosion, and protection of forests. Coffee plantations are more likely to be fair trade certified if they use traditional farming practices with shading and without chemicals. This protects the biodiversity of the ecosystem and ensures that the land will be usable for farming in the future and not just for short-term planting. In the United States, 85% of fair trade certified coffee is also organic.