Another concern is that long-term pollution, at even low levels, can affect whole ecosystems, with resultant impacts on biodiversity that bring about additional changes in how ecosystems operate.
英
美
- 另一個(gè)涉及的問(wèn)題是長(cháng)期污染，即使在一個(gè)很低的水平它也能影響整個(gè)自然界，影響到生物的多樣性，其結果使生態(tài)系統在如何發(fā)揮作用方面發(fā)生意想不到的變化。
