The water pollution sources in Fushun city were investigated in 2002.

于2002年对抚顺市辖区内水污染源进行了调查。

youdao

Water pollution sources are: construction encampments, bridge construction.

水污染源有：施工营地、桥梁施工。

youdao

However, it produces the fracturing liquid in fracturing, which has become one of the current oil field water pollution sources.

但油井在压裂过程中产生的压裂返排液已成为当前油田水体污染源之一。

youdao

The contribution of diffuse sources of pollution to bathing water failures, both rural and urban, is being investigated.

BBC: Beaches 'need to improve'

Northumbrian Water said it was confident the steps would improve the bathing water, but added there were sources of pollution beyond its control.

BBC: Northumbrian Water to put ?6m into Saltburn water works

If these needed protein sources were to come primarily from livestock there is the very real potential for catastrophic pollution of water and land, not to mention the exponential increase in carbon emissions.

CNN: Oceans: Environmental victim or savior?