acid rain
Plural
acid rains
1
rain containing a great deal of acidic chemicals, caused by air pollution, which can harm the environment
- The once-clear mountain stream turned murky after years of acid rain falling on its watershed.
- The marble gravestones in the old cemetery showed pockmarks caused by prolonged exposure to acid rain.
- Forest rangers noticed weakened pine needles on high-elevation trees where acid rain was most intense.
- Stricter emissions controls on power plants have helped reduce the frequency of acid rain in the region.
- Students tested rainwater samples from different parts of town to measure the impact of acid rain.
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