pollution sources

基本解释

But what about pollution sources that have already been built?
但是，那些已经建成的污染源又该怎么办？
The project succeeded in screening 346 sites with potential chemical contamination risks and identifying 58 priority pollution sources for follow-up mitigation actions.
通过对346个具有潜在化学污染风险的点进行筛查，这一全球环境基金项目识别出58个重点污染源作为采取后续措施的重点。
to organize, direct and coordinate environmental quality monitoring and supervision and monitoring of pollution sources;
组织、指导和协调环境质量监测和污染源监督性监测；

The country's first national census of pollution sources is due to begin in February.
ECONOMIST: Environmental protection in China
Not surprisingly, in the United States, asthma sufferers are often in low-income communities near major pollution sources, such as freeways or factories.
FORBES: How Our Buildings Are Making Us Sick
So people who live downwind of big sources of pollution really do have drier lives.
ECONOMIST: Weather and pollution