source of pollution; pollution source
Refers to the origin or cause of environmental contamination, such as a factory, vehicle emissions, or chemical spill.
The factory is a source of pollution for the river.
An investigation was conducted to identify the pollution source.
Compound of 汚染 (osen, 'pollution') and 源 (gen, 'source, origin'). The reading おせんげん follows standard on'yomi.