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acid rain
noun
: rain that has increased acidity caused by environmental factors (such as atmospheric pollutants)
Examples of acid rain in a Sentence
trees damaged by acid rain
Recent Examples on the Web
But using sulfur dioxide can also be considered a pollutant that might irritate people’s lungs, lead to acid rain, and potentially rip open the Antarctic ozone hole.
—Justine Calma, The Verge, 9 Dec. 2024
The European Union, which included the UK at the time, instituted new rules to address acid rain, which raised the cost of coal plants.
—John Timmer, Ars Technica, 30 Sep. 2024
The emissions that cause acid rain were cut in half.
—David Frum, Foreign Affairs, 18 Aug. 2014
Green methanol also has a lower sulfur content, reducing emissions of sulfur oxides, which contribute to air pollution and acid rain, according to the World Economic Forum.
—Dylan Butts, CNBC, 28 Nov. 2024
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Word History
First Known Use
1845, in the meaning defined above
Dictionary Entries Near acid rain
Cite this Entry
“Acid rain.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/acid%20rain. Accessed 23 Dec. 2024.
Kids Definition
acid rain
noun
: rain with increased acidity that is caused by environmental factors (as atmospheric pollutants)
Medical Definition
acid rain
noun
: acid precipitation especially in the form of rain
More from Merriam-Webster on acid rain
Britannica.com: Encyclopedia article about acid rain
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