例文
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- Agriculture is the single greatest source of water pollution in the country.
- It has done little to regulate farm runoff, a major source of water pollution.
- Parking lots tend to be sources of water pollution because of their extensive impervious surfaces.
- Another source of water pollution is aqueous leachates from oil shale ash and spent shale.
- Parking lots, along with roads, are often the principal source of water pollution in urban areas.