The Use of Fertilizer Has Produced Mixed Environmental Outcomes

The use of fertilizer has produced mixed environmental outcomes.Why?

A) Because it has promoted more crop growth but also an increase in plant diseases
B) Because it has promoted more food and less starvation but has also led to aquatic dead zones and amphibian deformities
C) Because it has led to less hunger and more biodiverse oceans
D) Because it has produced less hunger and fewer human related cancers