Nitrogen fertilizers make it possible to feed more people in the world than ever before. However, too much of it can also harm the environment. The main objective is to produce abundant, nutritious, and affordable food and give farmers a chance to make a living, but do all of this while minimizing pollution of the environment. Averaged globally, about half of the fertilizer nitrogen applied to farms is typically removed with the crops, while the other half either remains in the soil or is lost from the farmers' fields. Knowledge and techniques already exist to make agriculture more productive and environmentally sustainable at the same time, yet many economic and social barriers still stand in the way of widespread adoption of practices by farmers.