long term effect of pollutant

例句：

1. 1. The pollutionhas had a long-term effect onthe local ecosystem.
   污染对当地生态系统产生了长期影响。
2. 2. The company's decision toinvest in renewable energy has had a long-term effect on its profits.
   公司决定投资可再生能源，这对它的利润产生了长期影响。
3. 3. The researcher found that the long-term effect of climate change was notas severe as previously thought.
   研究者发现，气候变化的长期影响并不像之前认为的那样严重。