There is water__on the earth.(pollute)

There is water__on the earth.(pollute)
There is water__on the earth.(pollute)

There is water__on the earth.(pollute)
There is water_pollution_on the earth.地球上有水污染.

答案： 【pollution】污染
pollution是个不可数名词


【Me YC真诚为你解答此题，若有疑问请及时追问，满意望及时选为满意回答】