Fertilizer use differs from country to country, and from too little to too much. Nitrogen and phosphorus can produce big crops,but . But they can also pollute water and air.
英
美
- 肥料在不同的国家,用太少或太多,都会有不同。氮和磷能使农作物长得更壮,但是,他们也会污染水和空气。