| English | 意味 |
|---|---|
| point source/pɔɪnt sɔːs/ | 点源 |
| nonpoint source/ˌnɒnˈpɔɪnt sɔːs/ | 非点源 |
Where pollution comes from
- To clean up pollution, first find where it comes from.
- Some pollution pours from one clear spot.
- Some seeps in from everywhere at once.
- Scientists split sources into two types.
Point sources
- A point source 点源 comes from one identifiable spot.
- A factory's discharge pipe is a point source.
- So is a single sewage outfall or one oil spill.
- You can point to it on a map — hence the name.
汚染の点源とは…
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汚染の点源は明確な一つの場所から発生します — 工場の排管、煙突、単一の漏洩など。
Nonpoint sources
- A nonpoint source 非点源 is spread out and diffuse.
- Rain washing fertilizer off many farms is nonpoint.
- So is oil and grime rinsed from every city street.
- There is no single pipe — it comes from the whole landscape.
点源还是一非点源か？
各汚染源を、単一の地点から来るものか、広範囲に散在するものかに分类してください。
汚染の非点源は管理が困難です、なぜなら…
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汚染の非点源は拡散的であり、多数の農場や道路からの流出水であるため、塞ぐべき単一のパイプがありません。
農地や道路から雨水が汚染物質を洗い流して川に流入することを____と呼びます。
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流出水は土地から拡散的な汚染物質を運びます — 典型的な非点源です。
Why the difference matters
- A point source is easier to control — filter or plug one pipe.
- A nonpoint source is much harder — you cannot filter a whole region.
- Nonpoint pollution is now the bigger water-quality problem.
- Fixing it means changing how we farm, drive, and build across the land.
点源は非点源よりも一般的に管理しやすいです。
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単一のパイプにフィルターを取り付けられますが、広大な田舎の流出水を簡単にフィルターすることはできません。
汚染の点源として該当するものをすべて選択してください。
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パイプ、排放口、単一の漏洩はいずれも点源です。多数の農場からの流出水は非点源です。
The test is simple: can you point to one spot on a map? A pipe, an outfall, a spill — point source. If instead it's washing off everywhere — farms, lawns, roads, parking lots — it's a nonpoint source. The distinction matters because point sources can be regulated at the pipe, while nonpoint pollution has no single pipe to control.
Two polluted rivers:
- In one, a factory's pipe pours chemicals straight into the water — a point source you can find, measure, and order shut.
- In the other, no single pipe is to blame: fertilizer from a hundred farms and oil from every road wash in with the rain — a nonpoint source that no single fix can stop.
Pollution sources are point or nonpoint. A point source comes from one identifiable spot (a pipe, an outfall, a spill) and is easier to control. A nonpoint source is diffuse — runoff from many farms, streets, and lawns — and is much harder to fix because there is no single pipe to plug.