Explain how the use of fertilizer can have a negative impact on the environment.

Answer:

Fertilizer can have a negative impact on the environment, because of its high nutrient content. When fertilizer enters waterways as runoff, it causes waterways to have an excess of nutrients. This excess of nutrients causes increased algae growth. When these algae decay, they deplete the oxygen in the water, negatively impacting organisms that rely on the oxygen in the water for survival.